Thiel 7.2 or Revel Studios

Sounds like you might want to indeed try your Mac amp with those 7.2's, should you go that route. Then at some time, compare a slighly more extended/agressive amp for comparison, like the Krell is. I personally like the Pass amp's on the Thiels. X350 or mono's is good on the 7.2's.
I think the Krell's would do better on Revel's byenlarge. But you gotta tinker. It's called "tweakin'!"

I know it's a little bit off topic but I have to sneak-in my two cents. I do not belive Mac power amps match well with Thiels. I have CS2.3 myself and tried to power it up with MA 6900 then MA 402 and MA 252 power amps from MAC. I really loved Mac looks and special feeling it gave me but sound-wise I always knew there was something wrong. To make long story short - I was convinced by a fellow A-goner to try SIM W5 power amp. Now we are talking. Absoloutly no comparition. Mac was beaten and left bleeding asking for mercy. Oh how I am glad I had tried W5. It exells in bass control, weight and timing, has marvolous mids with harmonics that are die-for and top end that while never aggressive tells like it is. I am so much happy with SIM that I want to share it with others. Go figure for yourself. You will find Mac then as dull, boring, with obscured detail and wooly bass.

Irish, if Thiel recommends the Krell, I'd wait to see how that combo works before spending too much time on evaluating other amps. With a room that big, you definately need some hefty speakers (or near field listening preferences). Good luck -- let us know how things turned out.

At that price range I'd bypass both of those selections and buy a pair of C3's by Green Mountain Audio. From the people I've talked to who own them, there's nothing under $20k that can touch'em.

Irish,

I did a lengthy demo with Krell 350's and Thiel CS6's. I now own a pair of CS6's and I am powering with McIntosh 1201's. On robust classical the sound is pure amazement. I don't want to enter my personal issues into your thread but if you have a preference to rock music I would rethink about purchasing Thiels, just my opinion and I apologize to any offended Thiel fans. I can't offer any input on the Revel's.