High sensitivity (99) with mid powered (50 to 100 wpc/tube) amps?

@immatthewj

I auditioned the Forte IV a couple weeks ago and cannot recommend them. I was looking at the possibility of a more full range bass response than my Spendor D7.2 towers and a more present, dynamic presentation.
Unfortunately the Forte IV sounded slightly dark and un involving in comparison.
The bass could be very deep and enjoyable but it seemed slow and disconnected from the music. It was also missing the mid bass punch my speakers have. On one of my demo tracks talking heads psycho killer live, it opens with a tight and punchy bass line.  The punch was totally missing from the Forte IV.  
This was very weird to me because I listened to the Forte III a few years ago and loved them!  Similar amp too.  They had everything the IVs lacked except for a bit too much cabinet coloration.  
If you have the budget, give the Pure Audio Project Duet 15 a try.  

Thank you for the input, @avanti1960  , I did a quick google and the Pure Audio Project Duet 15 is a bit out of budget right now.  I am not quite as excited about the Fortes as I was last night (last night I was thinking that in the morning, or on Monday moring, I'd be ready to call up MD and pull the trigger).  That often happens with me.  

Anyway, I do not want to go to a speaker that would be a lateral move or a slightly above lateral move.  And as I typed earlier, as much as I appreciate MD's generous audition period, I would also like to advoid mailing a140 Lb.s of speakers back to them.  that was why I was interested in thoughts on them, and, to be redundant, my first thought was whether speakers that are that efficient pair well with the kind of wpc I currently am using.  (I would truly like to try the low [powered SET with high efficiency speaker route, but if that happens, it is down the road.  Just for grins, I did browse ebay to see what Dennis Had had going at the moment.)

Anyway, thanks again for your input based on your experience with them.

As far as your Spendor towers, are those the ones that are two way speakers mounted in a cabinet as opposed to a speaker stand?

@immatthewj,

Nice pair of JBL's for sale in State College, PA see here!

Mike

Thanks, Mike . . . State College is a doable trip and after a few googles that seems like a helluva deal on them, but still a "tad" over my budget, and from what I read, they are "big room speakers"?

few tips from another person who is/has run hi efficiency speakers.

The power is fine for the Klipsch's more then you will need but not excessive. 

The first issue you may encounter; Is your system quiet enough for the speakers?  Took me a while to find components that were, tube and also quiet enough for the LaScala's (105db) I had.

Tubes that are bad or going bad will show signs sooner, maybe a good thing.

Preamps/or preamp stages that have low enough over all gain to have a usable volume range. This also ties into over all gain being being too hi. Took me a while to find a pre-amp that had a good usable volume range and was dead quiet. 

Another thing you may want to find tubes that are a bit on the smooth/laid back side of the sound spectrum as the horn loaded tweeters in the Klipsch's can excite some people. also the Forte's are not good really close to the wall as they have a passive radiator in the back to support the bass.