Definitely need the features of a more expensive model. I have a ps3, xbox 360, wii, FyreTv

(beta), high def DVR, B&O turntable, Zune, and a Dell XPS m1730 that I will be using with the system. The current receiver doesn't do much for me at all right now. Everything I read said that the SLS speakers were awesome, but the receiver was a re-badged Sherwood that needs to be replaced.
I guess I can go with the 663 and get HD Radio at a later date!