What are your thoughts on these pre/pros? They are roughly the same price and offer 7.1 surround processing. I'm planning to get a new pre/pro for my HT set up and these are my short list of candidates: Rotel RSP-1066, Adcom GTP-830 and Sherbourn PT-7000. I don't care much about gimmicks or fancy features. Just need a pre/pro that can play up to 7.1 mode and can deliver the best perfomance.