I'll let those that actually own Axioms answer for sure, (not there yet), but from what I've heard the 150 has a wider range and is definately an upgrade over the 100. Whether it's worth it is up to you, but if you're like me, it'll be hard to swallow the 100 knowing the 150 would be better. Besides, if you're already a 1000 (!) over, what's another $130. Hopefully some others that have tried one, the other, or both will be able to chime in.

-Nick

My M60's make me listen
My M80's make my ears hear
Either way - I'm not deaf anymore