Power supply, analogue output stage and the clocking circuit will all render huge improvements in either a ss or tube player. Which is more important........I suspect they all are since they lend synergies with one another. I had the superclock III and the super clock power supply along with the transport caps installed/upgraded and the improvements were substantal. Next on the list is power supply and audio board rebuilds. Modifications are being performed by Douglas Jesse of RAM's east...He is doing an excellent job.
Chuck
Chuck