Why not try them both out in your system? With Pass gear, you have the advantage of being able to try it out if you purchase from Mark at Reno Hi-Fi. So why not give it a try in your system? Mark's return policy is superb as is his service. A favorite retailer of mine for sure. I think Audio Advisor sells the JC-2, and they also have a nice return policy as well.
Pass Labs XP-10 vs Parasound JC-2
Anyone had a chance to compare these pre-amps side by side? They are about the same cost (used). They would drive two JC-1 power amps. I am leaning toward the JC-2 just because of the power amps, but really like the Pass design philosophy and have heard good things about this amp.