I just purchased a yamaha cdc-585 because its one of the quieter changers i've ever heard.  I use its analog outs and it sounds great.  If you're using the digital out, then the sound wont change from whatever you're currently using.  At $150, i think the 585 is a steal.
If you need a variable output for headphones and a few other options, go with the cdc-685 for $200