However, the OP does not really need a complete CD player. A normal CD player essentially consists of two parts, the drive/laser assembly that produces a robust digital signal (for years Meridian just like many other high end manufacturers used bog standard Philips asemblies), and a DAC that converts that digital signal into an analogue signal.
Thanks to robust error correction, the digital signal is a bit perfect copy of the original recorded file (see here for an explanation of digital error correction:
http://abcnews.go.com/Technology/story?id=119305&page=1) So whatever your player, and as long as you have not totally destroyed the disc, the digital file will be the same bit perfect file. Sonic differences (though quite small) only emerge afterwards, when the digital file is converted into an analogue stream. Since the OP already has a digital to analogue converter in his pre amp/processor all he needs is a player with a digital output (preferably optical in his case). Whatever player he uses, as long as he uses the digital output, there will be no sonic differences. So he might as well use that old Sony Playstation 3, or whatever he has or buys cheaply. The only two things to consider are the mechanical noise level of the drive (that proverbial Playstation is pretty noisy) and the convenience of the user interface. But make sure it has an optical output.
