Find a store that sells Paradigm Studio 100's. They sound closer to the M80's than any other speaker I've auditioned. The 703's are close, but lack the mid range and low end of the M80's. The Paradigms have a tad more low end than the 80's but they're pretty close on the mid range. neither is exact to the 80's, but close enough to give you a pretty good idea of what to expect.
Haven't heard the M60's.
Outlaw also makes a pretty nice, reasonably priced sub. I've got the LFM 1 and enjoy it. I think Outlaw has done some improvements to it over the past year too.
