Levinson, Pass labs or Parasound?

I had a X250 and now the JC1's. I think the parasounds are an all-around better amp. I don't have stats but understand that the JC1's drive them very well...

Pass Labs are way more cool, figuratively at least.

We just started carrying the Nuforce line in Canada so you may want to take the following with a grain of salt.
I'm also driving Soundlab A1's; until recently with the JC 1. It's a great combination that's worked well for the last few years and recommend it strongly. I had an ML 334 prior to the JC 1 and they just didn't have the power to drive the speakers at the sound level I most often listen.
About a week ago i hooked up some Nuforce 9SE V2 amps; it surprised me that they could drive the A1. Plugged straight into the wall, it was about even, although the bass on the 9se v2 was clearly in a different league, but once i plugged the 9SE V2 in into a PS Audio Powerplant 300 it was clear these amps worked very well in my system. Give the NUforce a listen; the US dealers have a trial program, assuming you're in the States.