What's Absolute Best Upsampling CD Player $2K-$3K?

I'm looking in buy a USED CD player to upgrade my system. I want to spend $2000 - $3000 for a good used upsampling CD player. My amp is Classe 401, Piega P10 speakers and Krell HTS 7.1 Pre-Pro. I'm presently using a Marantz DV8400 double-duty for audio and video. I can keep the DV8400 for DVD's and get a good dedicated CD player for red book CD's.
Thanks