Very large room HT

I disagree. I've had some of the most expensive high end audio gear and loud speakers imaginable in my systems, and played, installed, and tinkered with most all of it.
Here's a little snipped of the review of the Monitor Audio PL-200's:

"At very high levels, the PL200s couldn't match the sense of dynamic ease that characterizes the Avantgarde Uno Nanos, but the same thing might be said of just about any speaker of similar size and driver complement. "

Boys and girls, THIS IS TYPICAL OF MOST STANDARD "HI-END AUDIO" HOME AUDIO LOUDSPEAKER OFFERINGS, attempting dedicated home theater system duties!!!"
Yes, if large scale dynamics, effortless power and presence, and focused, solid imaging, coherent, acoustically forgiving designed loud speaker designs are not in your consideration (GO TO ANY IMAX THEATER AND TELL ME THE SYSTEM DOESN'T STOMP YOUR GUTS OUT AND SMACK YOU IN THE CHEST WITH DYNAMICS!!), than you you can mostly go get just about any "hi-fi" audio speaker, and stick em in your system! FOR MOVIES -especially - you can be sure you'll not get ANTHING much more special, from one choice to the next, that's ANYTHING MUCH MORE SPECIAL than what you can get from any other similar loudspeaker design! You don't think so?! YOU JUST READ FROM THE SAME REVIEWER WHAT THE SPEAKER DOES AND DOESN'T DO!
Let me tell you what they DON'T DO...ANY OF THE ABOVE NECESSARITY EFFECTIVE TRAITS THAT A GOOD HOME THEATER LOUDSPEAKER IN AN ALL OUT HT SYSTEM SHOULD OFFER! - that's what!
So if delicate, micro scale, 'LAID BACK" , to open sounding, and average HT dynamics, coherence, and presence for THX system duties is your cup of tea, then by all means. you can easily go with some OVER EXPENSIVE home audio music loudspeaker, and stick em in an dedicated home theater system!
I say, why waste your money, when you can do all the necessary HT soundtrack playback(movie recordings aren't Dianna Krall and high rez super audio cd master 2 ch recordings, btw) with absolute effectiveness WITH A TRIED AND TRUE INDUSTRY RECOMMENDED THX SPEAKER SYSTEM for your EXTENSIVELY DIFFICULT ACCOUSTICALLY UNFRIENDLY DEDICATED THEATER ROOM SETUP, which likely doesn't work so effectively with standard music speakers in the first place?!!!
If you're going to go the Thiel, Wilson, B&W, esoteric music kit choices for your DEDICATED home theater setup (not music, btw, as was not described here as an application), then simply save your money, and buy most any highly rated Class B or A Stereophile monitor on the used market, add a subwoofer, hook it all up with your choice of processor and used multi-channel Class A or B Stereophile recommended amplifier and Oppo player, and be done with it!
I assure you, ALL THE HIGH END AV AND EVEN STEREO MAGAZINE PROFESSIONAL REVIEWERS are using more dedicated HT type home theater loud speakers for their "dedicated" HT systems!
Not what's being recommended previously.
You're choice. But it's all been done before
Yawwwwwn.
The Klipsch THX system still is WAY more effective, "CLEAR ENOUGH", detailed "enough", and super coherent, dynamic (for a passive speaker system), MORE than potent and hard hitting enough, and solid enough of an imager (no you don't need super super deep imaging from an ht loudspeaker, YOU NEED PRESSENCE! -even slightly upfront soundstaging would be preferred over laid back audiophile!) to be a better choice for most applications of this type!
Yep, to many years of tinkering with esoteric audio gear to know what to recommend, what works, and what doesn't.
I guarantee NO ONE with what I recommended will be disappointed (except the 2 channel tube/analog only guys listening to "jazz at the Pawn Shop" on a loop, will think ill of said recommended THX's formula! - 1000's of hours of tried and true home theater select gear, btw!)
The used listing for speakers is full of choices that offer nothing so special, soundwise, if you're main goal is an effective, all out home theater speaker system.
Just sayin...

You have to read better. Before you talk this kind of bullshit. The Pl-200 is not a big speaker, so it does not go that low. But........it can play till about 118 db without stress. If you had better read my threats you would have known that I use the PLW-15. This sub starts at 16 hz. With my way of measurment and Audyssey Pro it get the best stealth integration ever with a subwoofer. I was at a show with over 50 distributers. At the show were; the new Dynaudio evidence platinum, Focal Scala's, Magico S1, new 800D and many more. Many distributers came to me to congratulate with the best sound of the show. The day after the show the chief editor of the biggest Audio Magazine called to say we were the absolute sound. And you know why......Because I had the best timing, the most convincing 3-dimensional image, best natural sound. On monday many shop owners came to me thay they never heard this level in touchable sound ever. And now back to Klipsch. The difference between the PL-200 and the Klipsch are the cross overs. The stage of the Pl-200 is wider and deeper. This part I can use to the max. I play 5 metres behind the speakers and 1 metre beside. This makes the stage so much bigger. The instruments and voices are foccussed sharp as in real. Most people never heard a demo what was this touchable. I played many bluray's at live level at the show. Klipsch was also at this show, I did not hear any person talking about how great Klisch was. Klipsch has not the accuracy in playing this deep and wide as the best highend speakers do. The stage is less deep and less wide. Instruments are not that loose from eachother. Playing loud does not say anything about the stage it can build. This is the part were you can reach the highest level. I could play extreme loud but still with a very deep and wide stage. No harshness and the sharpest individual focus of instruments and voices most peole ever heard. Next time think sharper before you think your Klipsch speakers are that special. Because in depth and in wide the crossovers are not that special. You never can reach the 3-dimensional level in sound. This part is the reason to blow every person away.

Avgoround forgets important parts of the same test. Here are some other quotes from the same review:

but I've listened to this recording many, many times, and through the PL200s I heard details of orchestration that simply had not been apparent before. For example, in the arrangement of Pachelbel's Canon in D, I noticed for the first time that a percussion instrument enters the fray (at 2:42 into track 3) making "clucking" sounds. Could I have heard it through other speakers if I'd listened more attentively? Perhaps. All I can say is that with the PL200s in this system, the presence of this instrument was very obvious, and an effective part of director Harold Farberman's arrangement.

here is the link of the full review:

http://www.stereophile.com/content/monitor-audio-platinum-pl200-loudspeaker

Link Pl-200 review

http://www.stereophile.com/content/monitor-audio-platinum-pl200-loudspeaker-page-2

Hi guys. Bo and Av ground
I read and thank you for your honest opinion !
I wish I could invite you to my apartment's large living area.....
I need a hybrid of your advices.
HT 80%. Music ,Internet radio and cd's ( non high Rez or super cd) an occasional clasicals.
20000 $ is a lot and I want to fill this large living area with lots of depth hight and width
More specifics please on amp ,Pre and best to get there .
Thanks Salmoni