I liked the Music Hall 25 in this price range better than anything else I heard. It's warmer than others (which tended to be bright) but without loss of detail.
It lists for about $500 new. I am not a fan of used CD players.
If you can stretch to $1000, consider the Olive Symphony, which gives you full music server capability in a CD player drop-in replacement. It's real nice to be able to put your CDs away permanently.
Search the fora here, this question has come up before.
Cordially,
Eric