Without knowing the spl levels you wish to achieve, hard to say. The wattage spec is fairly meaningless, use the sensitivity spec and the distance to your seat to calculate how much power for the spl level you want. Probably the avr will be just fine. I'd get a subwoofer with those speakers, though.
1. Yes, Audioquest is just silly audiophool stuff intended to take as much money out of your pocket as possible. At least you didn't get the more expensive ones. If you want to read about speaker wire, try this
http://www.roger-russell.com/wire/wire.htm
2. Yamaha is cited for better reliability but otherwise they're far more similar than different, I like Audyssey XT32 in my Denon very much, an improvement over XT like the 1300 has...
3. Passive bi-amping is a waste of time/money/wire.