Pass Labs X150 v. Bel Canto Evo2 amp.

I've long heard that Pass Labs makes great sounding amps. I have small room and don't need alot of power. I have Vandersteen 3A Sig speakers and a Supratek Chenin preamp. Would the Pass Labs X150 be an improvement over the Bel Canto? Does it sound clinical and cold or does it have sufficient warmth?