jordanz, I have the Axiom package you have (SVS sub though). I have found the VP100 to be terrific. Have you taken the time to calibrate the speakers with an SPL meter yet? Made a world of difference for me. I found my ears are not nearly as accurate as the meter. Also, try positioning the M60s a little forward of the VP100 - they tend to add to the front soundstage for you.

I got the 100 because of space limitations and I am happy with it. Had I the space, I would likely have gone after the 150 instead. What you want to avoid is the dreaded "what if". It will eat at you forever. If you can swing the cash, go for the 150 and be forever happy.