Ok then! Let's add even more to the fun!!

I'm gonna go out on a limb here. To help you choose-The M60s sound much like the 703s, and I'm going to guess that the M50 sound closer to the Swans.(IF the New Swans sound similar to the Old Swans)

To sum it up simplistically: While the differences between the two Axioms isn't quite Nite&Day, the M60s are somewhat more clear and analytical, while the M50s are more warm and "Pleasant"

This is what I've gathered by reading-not listening!!

Good Luck-Have Fun!
Rich.