Yamaha DTXpress/DTXplorer/DTXtreme

I recently picked up a Yamaha DTXPRESS II kit and love being able to 
practice at 11pm and not wake the neighbors (or my wife, for that 
matter).  

One Problem: If I play along with music, I can only last an hour at 
most before my lead hand starts to cramp from the pad's vibrations. I 
always stop immediately to avoid CTS. I've started using Zildjian's 
Anti-Vibe sticks, and they help, but I'm wondering if there is an 
electronic kit out there I can upgrade to that lessens or eliminates 
the vibration issue I'm experiencing.

Any suggestions?  At this point, I'm not worried about price, I just 
want to know what's out there.

thanks!