Looking for the best CD 3-4k

EAR Acute

Tripper, Tent Labs is a kit, not a ready-to-go player.

AnhKhoa, please tell us what unique technology does Gamut use that makes their CD player outperform all other Cd players!!

Goone, I like very much the McIntosh MCD301 player, I believe you can get one used for about U$ 3K.
Regarding your picks, IMO the best by far is the ARC CD7, a great option if you find it at a good price.

I second the ARC CD7 recommendation; used and in excellent condition, you might be able to get one either at the upper end of your stated range or a little above.