Best sounding CD Players with Variable Outputs to use Direct into Power Amp?


Looking for the best sounding CD players with variable outputs to use direct into my power amp. My amp is an Odyssey Stratos with Vandersteen 2c speakers. My budget is between $300-$400. Seems the most prominent brand to offer variable outputs on a lot of their players is Sony, particularly their ES stuff. One particular model I am considering is the CDP-X555ES. Does anyone have any experience with this player when using direct into a power amp? Another option is to use an Emotiva Control Freak (balanced XLR) with an Adcom GCD-750 I can pick up locally.   
jsbach1685
A little late here, but I use a Resolution Audio Opus 21 directly in to my amps. Before that I used a Resolution Audio CD50 sometimes direct. Both players control volume in the analog domain. The Opus 21 sounds wonderful this way.
The older RA cdps can be found in your price range.
There is usually a RA Opus 21 for sale over on Audio Asylum- Asylum Trader (classified section).  Happy Listening!
FYI..Have a GNS Opus 21 , and last spring Steve Huntley at Resolution audio installed a new drive mechanism for the CD, and it's still in the box!Never played since he sent it back, as I have a Modwright 105 that sounds great and plays video as well))..As long as they are around, I wouldn't fear buying one of their older players . The direct in gives you more money to spend elsewhere.