Generally I find the Bryston/Lexicon stuff a little sterile and plain/processed sounding. I think the Sim stuff is sweeter, more pristine, extended, airy, and more tonaly right! I never cared much for Lexicon/Bryston, and think they never made anything (yes, including the HIGHLY OVERATED 7B's) so special sounding. sim however, which I've never sold, but have respect for, makes more refined audio gear. I'd vote Sim purely on Bryston's more "manufactured, middle of the road sound!"
