I am trying to find a good 5x amp to hook up to my Denon 3803. My budget is about 3k or less, and new or used does not matter. I am currently considering the Parasound HCA 2205AT, Sunfire, and CineNova Grande 5. Any thoughts on which would be the best? Other suggestions? And is there a difference between the ATI and CineNova? Thanks for the help!