I wish to upgrade my stereo listening music experience.\n\n\nI am certainly no expert in this technical arena, but my best and most honest advice would be to use...\n\nthe 6000f RP klipsch speakers ( highly sensitive speakers), the Onkyo RZ830 AVR (120 watt per channel 2 channel driven), and the marantz UD 7007 cd player\n\n...that you currently already have with you. \n\nThis will absolutely solve your dilemma. The one you have with you is 99% of the time the one you should use. If it breaks or if it can't do something specific like play a source format anymore, then that's a different story. But gear-acquisition-syndrome in the face of diminishing returns is no fun at all.