Ravi, I have the M22s, but don't have any direct knowledge about the M60s or M80s. At least for the M80s we have the benefit of the SoundStage review with NRC measurements; surprisingly, the M60 hasn't been tested, as far as I know. The major difference between the M22 and the others would appear to be in the bass, so your use with the EP350 would tend to even that out. Above the bass the M60 and the M80(even more than the M60, I'd assume)would be able to play at very high levels in very large rooms with lower distortion. In short, unless you're speaking of extremely high sound levels, I wouldn't think that they would be a significant upgrade over the M22s plus EP350.
