As you may know I currently possess some B&W Nautilus 803s, a Bryston 9B-ST amp and a Bryston 4B-ST amp. So far I've had the 803s hooked up to the 9B-ST, and it seems perfectly comfortable (bar going into thermal overload once - but this is probably forgiveable when the temperature outside the house is 37 degrees C in the shade). At some point I shall get around to hooking up my 4B-ST, and I was thinking about using the 4B-ST for the 803s, then bi-amping my eventual centre speaker with two channels of the 9B-ST. But it occurred to me today that, with all Bryston amps designed to have the same gain, I could instead leave the centre single-amped, and then bi-amp the 803s using the 4B-ST to drive the bass driver in both speakers, and two channels of the 9B-ST to drive the mid-range and tweeters. Does this sound like a Really Bad Idea, or should I give it a shot?