I bought the D500 for a friend. Was very impressed relative to an Anthem cd-1 (list $1800). Look at www.audioreviews.com for more reviews.
Best Cd player for under 500
At this point the 2 that i have been looking at are (used) the linn mimik and rega planet. From all the various sources available it seems like the rega has the edge but i would appreciate any additional comments. Speakers are linn tukans and amp is nearly vintage onkyo integrated from early 1980s