If "room correction" is a big deal to you, it probably should be at the top of the list of reasons to buy a certain make. It's going to make a bigger difference in the performance of a receiver than any other feature, just because it is there to change the sound. All the other features are there to preserve the sound.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris