Sounds like a very nice system. I've got B&W DM640s for left and right channels, powered by a 2 channel Carver amp rated at 225 watts per channel. That may be overkill for home theater, but I sure love the way it sounds in stereo when I feel like cranking it - pure, clean, loud, and always the feel of plenty of headroom.
I have a different home theater system using smaller B&Ws and a B&W CC6 powered at 100 watts/ch, and I agree - its worth stepping up a notch or two for the center channel.