Just got my Marantz SR8500 and Marantz DV6500 player in Friday. I have it all connected with the following. Room demensions 19'x16' with a 10' ceiling. RCA 55" (custom installed into entertainment center) Paradigm Ref Studio 60 L/R mains Paradigm Ref LCR450 center Paradigm Ref in-ceiling surround L/R Paradigm Ref in-ceiling surround LBack/RBack Paradigm Ref Servo-15 sub I was upgrading from my dependable and great sounding Denon AVR-3802 receiver I bought in 2001. I have to say there is a substantial difference overall. Movies are extremely dynamic from loud to soft passages. The low mids to bass frequencies are more apparent and stong, in fact I may change my front mains to small instead of large/80hz/both LFE and Main on. Dialogue is even huskier, forward with clarity. Music is fantastic to listen to on this system. I just turn off the sub and use pure direct or some times DTS Neo/PL IIx Music and wow, really amazing sounding. I'm very pleased overall. Now I just need to upgrade that blasted monitor.