The KF26 has a sensitivity of 97db. Any receiver could easily power these speakers. The Yamaha RX-V671 will have no problems.
The KF26 is a single so you need at least two. Then add a center and surround speakers plus subwoofer.
I would strongly advise you to give the Klipsch a listen before purchase or buy locally if possible. The Klipsch horn tweeter isn't for everyone as they can be bright sounding and fatiguing. If you purchase at Best Buy you have 30 days to return which should be plenty of time to test in your home.
I am getting the 671 as well. so does anyone have suggestions for speakers ? I would prefer a 5.1 or 7.1 surround sound. there seems to be a deal on best buy klipsch kf 26 and 28 .
So what does one need to buy besides a avr receiver and speakers ...sorry i am a novice. Are wires included in the 5.1 systems ?
You need speaker wire, none will be provided. if you happen to buy a 5.1 speaker package that comes with wire it'll most likely be thin and cheap and need replacing anyway. You will also need a subwoofer cable.
I buy all my wires at Monoprice.com. Good quality cables/wire at excellent prices.
Speaker wire 14ga, 100ft
Subwoofer cable, 12ft
Have no idea what else you're connecting but you'll probably need HDMI cables. I generally buy 6ft cables
Audiobuff you need to provide more information. What else would you be connecting to the receiver besides the TV?