I'm putting together a system for a pretty large room (about 20' x 30'). In a space that big, I know seperates are the way to go, but I'm wondering what (or if) components would work best in the $2000 - $2500 range. I'd really like to go with a 6 or 7 channel setup. I know there aren't a ton of pre/pro's that do those formats, so I'm fine with using a reciever and adding amps. Any suggestions?