Recently I purchased a Yamaha RV-750 just to check out 7.1 vs my 5.1 system, and auto setup feature. I am using the 750 as a pre/pro. I will just say I am never going back to 5.1. IMO, all future pre/pro's should have an auto setup feature with manual over ride. I know the 750 at $400 is not high end and it is a throw away item for me, but it did allow me to experience 7.1 and auto setup. I am sold on both. Now, to find a "real" pre/pro with these features.