Best PRaT CD Player for $600 or less ??

If you want to pay $150-200 more , I would say the best I have heard is Sony XA7ES, 35 lbs Class A player, stunning. Also after you have it for awhile and you fall in love with it. Get someone to change the power cord outlet IEC unit. Then add a Harmonix Master power cord, it will double its performance.
This player has amazing PRAT and is the best $$$ per pound. read in the forums.

shengya s10- or the us version called kavent-
great build , class a output

There is a Talk Electronics Thunder 1 just listed here on Audiogon for $399. Might be something you would be interested in checking out.

I cannot believe that no one listed the Rega Planet or the newer 2000 model. Musicality courtesy of Roy Gandy-the PRAT God! Listening to these players just gets your toes tapping.

Another vote for the Rega Planet (original): I tried "upgrading" to a Linn Genki and sold the Genki again. The Rega is much better in terms of PRaT and pulls you more into the music.