I have a 598DP with a 568.2MM and a single pair of speakers. I used to have a full surround system but decided that really high quality stereo is more important to me, which meant better speakers than I had. I've kept the 598/568 together because I think the red book CD performance is excellent with the digital link and because it enables any future move back to multi channel.

It's unconventional but I don't think you'll regret the move, given what you hope to achieve through the investment.

Regards,
Steve

Steve