I am looking through the features of different Denon receivers from their website and I noticed two of the top ones (2805, 3805) have an "Auto/manual room equalization" feature. What is that? I am looking hard at the 2105 (which doesn't have it) and wondering how nice of a feature it would be. More importantly, I noticed that the Denon 2105 doesn't have the "Audio signal delay----sync. audio with video signal" feature (only the 2805 and the 3805 have it). Not sure what this means. Without this feature, if I bypass the video connections on the receiver and just connect my DVD player to the display, does that mean that the video and audio could be out of sync?
