Just my 2 cents worth but I am currently running a set of M3's and a set of M60's with a EP175 sub using an Onkyo TX-8020 receiver. It's got 50 watts of pure analog power that kicks ass and you can get it for less than $200. You do not have have to spend a lot for good stereo sound. Onkyo makes a higher power version of it but I found 50 watts of pure power to be plenty for both sets of speakers.
Check it out.

M60-VP150-M3-EP350
Boston AVR7120