The only other thing to look at on the receiver you have is whether it has 'Pre-Amp out' jacks. This is important for purposes of adding an amplifier to supplement the receiver's amps. I bought a receiver around Christmas and was assured it had the pre-amp outs to use my existing amp, and it turned out it didn't, so you have to look. I don't know the Yamaha line that well to know if it does. If, with the speakers you want, the receiver gets you all the volume you want without cranking the volume all the way, then you're all set - well, kinda - separate amps are always going to perform better, but sometimes the cost/benefit ratio isn't good.
Power ratings on speakers are next-to-useless. A low powered receiver working too hard will ALWAYS damage speakers before a 1000W brute amp.
Power ratings on speakers are next-to-useless. A low powered receiver working too hard will ALWAYS damage speakers before a 1000W brute amp.