I've been upgrading my HT lately. I recently added Denon 1909 AVR, Panas. BD55 player, Paradigm Servo 15" sub (plus two KLH 10" subs I already had), so lows are more than covered.
Next will be new front L/R and center speakers which I am looking for ideas on. I finally retired my Klipsch Cornwall II's as they've always overpowered the center (and due to WAF). I like Klipsch but WAS leaning towards Paradigm F/L, Center, until it was mentioned that their low (90dB) sensitivity level would be an issue with my new Denon 1909 90 w/ch AVR. My in wall mounted surrounds have 8" drivers (M&S Systems WG150W) , so I was thinking (with no real knowledge ;o) my fronts should have 8" drivers, but someone said there's better midrange with 6.5" - 7" L/R drivers, since my Servo-15 sub requires no low base from L/R (or center). I'd love to hear more opinions on the 8" vs. 7" L/R drivers.
Searching older speaker threads, short discussions I've read, seemed to say that at a given price point, quality bookshelf speakers achieve better audio (when sub(s) are used) than floor standing speakers, so I am only looking at bookshelf units.
I WAS just about ready to pull the trigger on a pair of Studio 20 v.4's for front L /R and a CC-590 center.
My dilemma is that I need to decide ASAP to commit to ordering the Paradigm v.4's. If I do not order these in the next day or two, they may no longer be available as all V.4 Studio series are being blown out to make room for the just arriving V.5's with the curved cabinets and $100 added to list price!
OR
Do I change gears and look seriously at the Klipsch RB-81/ RC-62 set up due to their much higher efficiency?
Most speakers I see list only one dB level. Paradigm lists two, room and anechoic. Paradigm Studio 20 v.4 shows 90 room / 87 anechoic. I assume the first # (room 90dB) is the one to compare to Klipsch (and other) quoted specs? If so:
Klipsch Cornwall II..101 dB (now gone from living room due to WAF)
" RC-62 ................ 98dB (set up I am now considering)
" RB-81 ................ 97dB
" RC-52 ................ 96dB
" RB-61 ................ 95dB
Paradigm CC-290 v.4...... 94dB
" Titan Monitor....... 93dB
" Mini Monitor........ 92dB
" Studio 40 v.4....... 92dB
" CC-590 v.4.......... 90dB (set up I was looking at)
" Studio 20 v.4....... 90dB
With my 90w/ch AVR, do I drop sound quality by going with Klipsch RB81/RC62 vs. Paradigm Studio 20 v.4/CC-590?
Now I realize I will have a lot cleaner power to get a given volume level with the Klipsch's vs. the Paradigm.
How do you all feel about the sound quality comparison? Are the 8" woofer in a 2 way a crossover challenge, or somehow not as good as a 7" woofer in a two way? My WG150W in wall surrounds happen to have an 8" woofer with a 1" Alum dome tweeter. Could that possibly contribute to a better timber match with RB-81 front L&R? I realize front to rear matching is no where as important as fronts matching each other and rears matching each other (I have 7.1 set up).
AND LASTLY to a loooong post...
Someone mentioned on the Paradigm thread to just add an RC-62 to the Cornwalls and be set. If you all think that would work pretty well, I will go back into negotiations with my wife about bringing the Cornwalls back!

Would the RC-64 be a better match than the RC-62? If so I could squeeze it in.
Any thoughts are greatly appreciated, especially since I have my local Paradigm shop on hold from trying to order the Studio set up.
Thanks, Dave