Thanks a lot!I think the Emotiva C2+ and the Monoprice 365 will both be worthwhile upgrades to the 2 way Klipsch center channel in terms of sound quality. I would definitely order both and demo. My only concern with the C2+ despite its VERY impressive specs for the price would be the rising treble response all the Emotiva speakers seem to have. I think the Monoprice will be a bit more neutral based on what I've seen.
So yeah, order both and keep the one you like. I still think the RC263 at regular price is a worthy contender. Knowing it goes on sale makes it a tough pill to swallow.
I saw the RC263 online (in Dec I guess or maybe very end of Nov) before I knew anything about it (not sure if it was still on sale for the ridiculously low price (left out) for another a day more, or so, at the time, or whether it was already back to normal MSRP. Speaking of Infinity centers, someone sold a Intermezzo 3.5c center recently on auction. I personally did not like the finish of that one; there was one with a nicer finish - very light-colored - but the color is far too light for my setup; most importantly there are not enough professional reviews about it.
Speaking of deals, there was a limited time small discount on the THX-365C yesterday from Monoprice on eBay (before I even posted this thread). Just for the benefit of anyone else considering it.
Edit - I removed any actual sale / street prices myself after reading forum description / rule to the right....