cw, i am using a retail $500 nad 5-disc cd-changer w/excellent results feeding an art di/o dac that i've done some mods to. i have ~$225 into the dac, & will still be under $300 when i'm finished. the sound is noticeably better than the highly-regarded resolution audio cd-50, fwiw... also, a tube preamp is *essential* for *any* digitsal playback, imo.
doug s.