I think the M60s would do quite well for your setup (depending on what you meant by 'live' levels. I suspect you weren't talking about a 'live concert setup' but rather if the performers were in your room, as Jack mentioned.
I do agree with Peter in that if you consider going M80s, you may need to go with something different for amplification. Not that you said you were considering M80s, but wanted to clarify since they were mentioned.
Good luck on your decision, I'm sure it will be a nice setup with whatever you choose.
Welcome!
*EDIT* I just saw your other thread mentioning the 805 as certified for 4 Ohm loads, so nevermind my earlier suggestion as it looks like you are already covered.
