M80's are the way to go, but just make sure you have an amp that can handle their 4 ohm load (you'll want Harman Kardon or Denon, or better).

In the end, this depends on your budget, and how far into audiophilia you want to go. But one thing's for sure, the M80's with a good amp will ROCK! Add an EP 500 or SVS or HSU sub to those, and you will not regret your decision.

Tell us more about your budget and other plans for electronics and we'll have some more suggestions for ya.