Here's another link about the new announcements: http://www.devicemag.com/2010/06/02/onkyo-tx-series-receivers-with-iphoneipod-support-announced/ I'd hold off and wait for these to come out, they should be here in july.
The new Onkyos (X08 models) have a 5" fan in the top that helps keep them cool. The fan is dead silent, so don't worry about a vacuum cleaner noise coming from your rack.
As sort of a followup question, I have a tv that can do 16x9 anamorphic for 480i material (dvds, etc), and I want to be able to view hdtv material downconverted to 480i in anamorphic mode. I've gone in to the user settings screen on my DCT5100 and set my tv type to 16:9, but all of the hdtv...