I have a 10 year old Harman Kardon AVR-630 (upper end model) receiver with Monitor Audio SilverSeries 9i floor-standing speakers. My Harman Kardon CD changer, which I was delighted with sound quality wise broke and I am seeking a replacement. For some reason in thrift stores, I see a lot of Sony (both regular and their ES line) and Denon CD changers. Is this because people are unhappy with them reliability or sound quality wise? Besides Harman Kardon, what other brands of cd changers would sound good (be a good match) with my receiver and speakers?