Thanks so far, folks. I've read in reviews that one great way to run the Arcam AVR 307 (7 X 100) with a 5.1 A/V set up is to use the two extra amp channels to biamp the two speakers through which I'll do my music listening. Outlaw also mentions that in their promo materials.
I've biwired my speakers (with some audible improvement), and I know how to go about the biamping, but I didn't know whether different cables might have more appropriate sonic characteristics for my speakers. Since I run a subwoofer, I can imagine one kind of cable being better for the midrange signals my JM/Focal speakers will get, and another cable better for the higher frequencies. I know there's a bunch of snake oil dealers, and I appreciate both the caution and the advice Newmanoc, but I still haven't gotten any responses about my basic question of whether to go with two different kinds of speaker cables.
Hoping to hear more; the audiogon community always comes up with great answers.
Again: thanks in advance,
russ