Here are a few points to consider:
- I have Klipsch reference series speakers for HT and actually tried bi-wiring. I did not hear any real difference - my ears only of course.
- Klipsch actually recommends NOT to bi-amp its speakers. I can't remember if this was on their website somewhere or from an email I sent them.
- I think heavier gauge wire helps regardless of the technical requirements per the link provided above. My longest run is 25 feet of speaker wire and I used 16 gauge all around.
- I bough my speaker wire at Home Depot (by the foot) and it is very good quality. I bought all my cables from monoprice.com. Great cables and even speaker mounts, TV mounts as well.
- I am not saying Monster is not good, but I certainly think it is over-priced and simply elitist marketing hype (in terms of the product not people buying it)
- I like Yamaha and Pioneer Elite for AVRs. I just bought the VSX21-THX from Magnolia and it is AWESOME. I have heard alot of good things about Denon and less good things about Onkyo.
- Anything with about 90-105 WPC should be good for you given the power efficiency of Klipsch.
- Beyond WPC, critically look for the bells and whistles in your AVR – type of amp, speaker calibration, dual-zone, number HDMI inputs, DAC, IPod connection, networking, remote control, etc. Buy something that will (technically-speaking) last for 10 years. “Upgrad-itis” is completely different.
- My new AVR has the HD audio codecs and I DID notice a difference in the overall audio quality. Granted I think the auto-calibration was better in the Pioneer than the Yamaha model I bough a few years back; that may have impacted sound as well.
Hope this helps.