New Klipsch Conwalls (IV)

From my understanding (what I have heard elsewhere) is the CW IV is a much better sounding speaker than the III. Most reviewers have said the new mid makes for a large improvement. I too have read from some fanboys of the line that the crossovers are not the best. Improvements are available and easy to install.
I really wanted the CW IV. The price ($2K more than the III) was tough to swallow and I instead ordered a built pair of the Cornscalla type 2 from Crites. This is an interesting speaker, was nearly $4,000 less but decent enough to try instead. I have a set of ALK Universal crossovers on order that I will install in the future to see if I can ring out more HF out of them, but the Bass is substantial as is the massive Mid Horn. If these do not work out for my room, I'll likely start looking at the Forte III or elsewhere. The Cornwall and Cornscala take up plenty of floor space as well.

Feel bad for the guy above who bought the Heresy III's. Did the dealer even tell you the Heresy IV is now available? You made that dealer very happy Im sure.  Same kind of thing happened to me...picked up the Forte III brand new and about 1 month later the Cornwall IV came out. Luckily I never opened the Forte's so It will be easier to get rid of.

I seriously considered the Heresy III but ultimately decided on the Omega SAMs. My main issue with the Heresy was its neither a standmount nor a floorstander and I just couldn't figure out how to make it work in my room with the furniture, etc., getting in the way of listening position with the higher frequencies at ear level. 

Klipsch, 102db/1 watt efficiency is BORN for tubes, or any low powered amp. I like 30-35-45, but these would shake the place with 20wpc I suspect.

Very big room, then perhaps more power.

stereo pair of 15", with front ports, bass shy, huh??? I would say, make sure your preamp can cut the bass if necessary.