Proceed's not known as bright, I think that's Krell (but that aint an invitation for a flame war, if its wrong just say so) Proceed is good clean but dry power. Pretty neutral--described as gray in color sometimes. No added jingle. But there is a lot of it, wide and deep.
Classe has the juicy warm musical sound from what I remember.
Cant go wrong with Bryston-they're solid. I ran McCormack for a long time, similar to Bryston. Less expensive than Bryston in the aftermarket too. Very nice amp.
If I didn't already have the Proceed, I'd probly be getting a Bryston cause their so manly, or try the moon cause of all the good I've heard about it. But if you really like tube sound, look at tube amps, not these solid state's.