You'll get a less forgiving bow (brace height 7.0 vs 7.5)
Gain in speed difference is about 20 fps - you have plenty now to put down a whitetail
Shorter ATA by 4"
The Z7 makes much less noise than what you have today
The ability to say you have the latest and greatest from Mathews
IMO I'd keep what you have until you get more comfortable with the bow in general. You have a good bow that will do the job just fine with a well placed shot. It's all up to you and what your priorities are, but consider that the new bows will be out soon and leftovers will be a little cheaper.
Ah, so many things to think about.......Good luck and good shooting
Last edited by *twodogs*; 09-22-2010 at 07:35 AM.