Suggestions For A DAC


I ask your for your wisdom and comments on finding a good used DAC. With all the new technology coming fast and furious, it seems like there are alot of good deals out there on used DACs. Some that I am considering Cal Audio Alpha, Muse Model 2, Adcom GDA 600/700, Bel Canto. Are tube units as good as SS? Also, is 96k upsampling worth it? I listen to mostly jazz and my budget is around $500-$800. My current system is: McIntosh MA6450 integrated amp, MCD7008 changer and Boston Acoustic A-150 speakers.

Thanks in advance.

John
stereomaniac
Try the Kora Hermes DAC - it retails for 1500 but is solid and uses 3 tubes for output - it upsamples to 24/192 which gives your CD's a lift in sounding fuller. I have a Mcintosh 7008 hooked to it through a 6450. In time add a Perpetual technology digital engine between the player and DAC for megabucks sound.
Thanks everbody for your input! I've been reading them all with great interest and really appreciate you taking the time.

John