Honestly, I couldn't tell a difference between bi-amping and with out it. The bass might have be ever so slightly better but I can't be for sure, it was so very close, especially since the SC 05 is already a fairly powerful AVR. I had the volume at a moderately high level, -6 db. Having send that I'll probably complete a 7.1 surround system instead of bi-amping the mains.
Overall the SC 0 is pretty slick. For some reason though when I go into the menu options, sometimes the screen has a red tint! Could just be the TV, not sure...this is the first HDMI device I connected to my 720P TV. Also when I power it on, my room lighs sim for a split second lol