Wid - I was just going to say the same thing. While the earlier setup advice is correct, it still adds a lot of what may be unnecessary complication (and may not help much depending on the comparative output of the two and the volume levels you're trying to achieve, the room size, etc.).

I'd say try the M80s with the Yamaha first and go from there. Maybe you'll be surprised with how well the Yammy performs solo.

Jason

PS: Graeme - congrats! You're going to LOVE those M80s!

Epic 80-800: HG Cherry