You don't mention your budget, but assuming that you are willing to spend up to $1500, I suggest you consider the Bryston 5B-ST, which is rated at 3x120 wpc, but actually produces 3x150 wpc. As you can see from looking at my system listing, I am using the 5B-ST for my center channel and rear surrounds, and have been very pleased with it. The 5B-ST often sells used on A-gon in the $1300-1400 range.
If $1500 is too much, then consider the Adcom GFA-5503, which is rated at 3x200 wpc. I previously owned the 5503, and also bought one for my son's system, and for $600-700 (used) it's an excellent value.
If $1500 is too much, then consider the Adcom GFA-5503, which is rated at 3x200 wpc. I previously owned the 5503, and also bought one for my son's system, and for $600-700 (used) it's an excellent value.