Speaker choice without need for deep bass

Have you considered, that maybe you are moving the wrong direction from the best sound you will be able to achieve for your budget? I immediately thought of some great choices of two way speakers in the $10K to $20K range. But absolutely not in the $1K. 

If you have a budget system and want to get the best and coherent sound (matching a two way with and 18" subwoofer is going to be hard)...I’m just guessing this is not a $12K subwoofer. Then your very best bet is a normal dynamic tower speaker. You are going to get the best, most coherent sound from thing. There are dozens of companies producing very good speakers, especially used. B&W, Sonus Faber, Focal, DynAudio... etc. 

@jbuhl Quad S4 might be cabable, but a single 5 or 6 inch low/mid driver may not cut it. The 6" in my Epicure 5 certainly don't. Hence the desire for 2x 6" low mid. 

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ghdprentice: "wrong direction"? Maybe. But my testing/experience showed significant improvement in almost all relevant categories when I added the powered 18" sub (replaceing two meager 10", and then my great Velodyne DD15, now in use in the 2nd system), and later 'cut' the main speaker/receiver off at 50 Hz. Note: the main speakers were B&W Nautilis 804.

Having 'no need' for very deep bass frees up the main speaker design from huge cabinets with big volume to facilitate the huge woofers and the required massive air volume. Ergo: smaller, less complex speakers are possible. And that has already been accomplished. And I could rest. BUT, if I want to listen at elevated (call it 'live') souid pressure levels in my main room, it seem a single 6" inch low/mid even cut a 80 Hz is 'getting it done'. 

Aside from that: price has obviouisly nothing to do with the issues, since that is relative. If the budget were $10k, your (potential) answer would be "you need $100k to get even close to a decent system", just when the next guy chimes in "no way you can put a real quality system together for $1000k (thats a cool million). 

And yes, the 1.85 mio (just speakers and main amps) system I listened to extensively a few months ago (Sonus Faber Suprema, 4x Burmaster) was impressive for its absolute performance level, but it never measured high on my 'impressive' scale, because I have heard systems for 1/100 of the investment (not to speak of another mio to build a house with a suitable listening room) that were not THAT far off,  lol. 

it's not going to work INHO simply because bass isn't just bass. It' s not LEGO. You can't skip low frequencies and expect good sound by adding a sub or two. It won't produce full range. Sub is addition not completion. It has to sound good without the sub(s). There are lot of choice mostly used for a 1000. Arendal, Polk, NHT, Dali, Canton, Wharfedale, Q, Klipsch all have floorstanders that may work well.

Would Mofi Sourcepoint 8 be too big?  That should do it nicely with a powered sub in a larger room.