I second the Audio Aero Prima - IMO the best CDP I heard so far below 3-4K. Excellent resolution, very realistic portrayal of instruments. Piano is reproduced with natural decays and resonances. My only complaint about the Prima is that the bass could be just a tad tighter (which is true for many tube players.
As far as tube CDP go, I also had a Unison Unico, which allows you to change tubes, but I would avoid that one unless you like singers to have a permanent cold.
As far as tube CDP go, I also had a Unison Unico, which allows you to change tubes, but I would avoid that one unless you like singers to have a permanent cold.