I have an Onkyo TX-NR609 and a pair of B&W 685's.
I've mostly seen people saying it's not worth it to bi-amp, I figured since I'm not using those other channels any way I might as well put them to good use, but what do I know. I have tried them bi-amped and they do seem louder to me, although I've never put a DB meter on them.
Any other thoughts or suggestions? I've had this setup for a while now but I need to go out and buy new speaker wire because right now I'm using some crap wire that I took from a sub 75.00 home theater in a box.
Also, I was thinking 14 or 12 gauge wire, any suggestions? The runs are actually quite short, probably 10-15 feet max each.