Denf, Zormi. For what it is worth I have now listended to the Pass X350.5's, JC1's one more time, bryston 7bsst and the cj premier 350.
In my system, the cj prem 350 sounds overall the best. It has the tightest (jc1 was pretty tight as well) and most natural bass out of all of the amps. the bass with the pass was just a little loose. mofsets vs bipolar??. The high end has a degree of dynamic top to bottom life that the others don't have. Musically they are the most satisfying.
The Pass X350.5 sounds good, but in my system the bass was a little overwelming and seemed not to have the speed in the top end the cj has.
Bryston sounded very controlled, but lacking a little dynamic life and extension in the high's.
JC-1's sounded a bit gray and lacking in dynamics unless you really cranked up the volume. Micro dynamics were not as good as the Pass of cj. My personal opinion is that sound wise it was on par with the Rotel 1090, which for its price sounded great.
anyway, I am buying the cj prem350 to mate with my Vienna mahlers.