I have recently purchased a Pioneer PDP-436XDE Screen and Monitor Audio Radius speakers/sub and am very pleased with it. However, I want to upgrade other parts of my system in order to get the most out if it. I have all but settled on the Arcam DV79 DVD Player, but was wondering what amp would be best go with it. I am considering the Yamaha DSP-AX757SE. Would this be up to the job in terms of my setup? The Yamaha amp is reasonably priced. What difference would I notice (in terms of sound quality) if I went for the more expensive Yamaha RX-V4600 amp instead? Cheers, G.W.