3 channel amp: Bryston 6Bsst2? ML 533H?

I think I'm in the market for a 3 channel amp for my fronts and center channel. I figure a powerful 3 channel for the fronts and center and cheaper stereo amp for the surrounds will still give me great 2 channel performance (#1 priority) while allowing me to enjoy 5 channel, too. It also seems cheaper than a powerful stereo amp for the fronts and a separate multichannel amp for center and surrounds, since I'd want some power for the center channel and that would make the multichannel amp more expensive than I'd like.

Anyway, I was thinking about the Bryston 6Bsst2, but then saw a deal on a Mark Levinson 533H. Anyone want to sway me one way or the other?

Currently running an Arcam P7 for 5 channel surround, bi-amping the fronts with the extra 2 channels. Front speakers are Von Schweikert Unifield 3.