Well given those two only I'd have to choose the Bryston. Built like a tank and 20 year transferrable warranty ensures you'll have no problems to worry about for a while.
If you are open to others there are Krell KSAs to be had in this range, some older Classe, Balanced Audio, Mcintoch, and some Levinson just to name some high end brands. Depends on the power you're looking for and the type of sound. Of course buying used is always risky, I'd lok at Audiogon. I've had good experiences there and there's always tons of good stuff.