My room is 20 X 16 and I recently went with the M80's. Although the 60's would have likely been sufficient for my space, I wanted something more than just sufficient. To be honest, I never even gave the 60's much consideration at all since I just knew I wanted the biggest speakers Axiom makes. I have a 3-year-old at home, so I also wanted something that will sound great at low volume and, from all I read, the M80's fit that bill. I've only had them now for a few weeks, but I must say I am not dissapointed in my decision.