Line 3 are great (I have the SE), but it's not a good match with Pass which I also used to own. Pass is sensitive to the pre amp it is connected to, my experience with Line 3 SE with X-350 was less than stellar. A friend brought his X-1 over and it transformed the sound completely - more body, more coherent, and more musical.
But Line 3 with many other amps will sing better than X-1 & X-350. So I sold the X-350.
But Line 3 with many other amps will sing better than X-1 & X-350. So I sold the X-350.