having had one before with the egrip its not really that awesome, i have a feeling it would probably break a ball anyway just not chop it up. a Good electro hopper or cyclone always kept up with my response or egrip trigger.
Honestly I wouldn't let that determine how you buy a tippmann since chopping a ball, besides losing some accuracy, wont affect nearly at all if you can get a better deal on a non act one with some ups to it i'd go with that over just a bone stock ACT.
As for if you chop a ball, I use rainX on the inside of my barrel and that usually clears most breaks pretty well.
Kingmann Hammer PLUS