Personally I always liked the Apogee Mini-DAC with John Grado cans, so a nice stable platform transport feeding some clean Redbook CD signals to it can only help. Plus, the Mini-DAC is transportable so you can use a Discman with a digital out when you're travelling!
http://www.sweetwater.com/store/detail/MiniDAC/
http://www.sweetwater.com/store/detail/MiniDAC/






