Welcome, I am new-ish to the community as well, but not to home theater. I agree with Swa99a. Deal or not, wait for your budget to be available and get 160M. They are good for easy listening and have terrific quality. You could skip the sub until a later time if you want, those handle just upwards of 50Hz, so music with all but the lowest of bass would be reproduced perfectly.
I myself have used Denon, Marantz, and Pioneer receivers. With respect to all brands, most are capable of roughly the same thing. Watts per channel is not as important with efficient speakers. The real number to look at is THD (Total Harmonic Distortion). At 8 ohms, which most if not all of Klipsch products run on, even a decent stereo amp/receiver from the fore mentioned brands should be around .08% THD, which is fine. Aim for that, and you should have many options.
As enthusiasts, it really does matter which speaker set you get. In the end, get what works for you, but if you go with a slightly higher level/grade of speaker, they could last a life-time.