I use the carbon-fiber jazz3 max-grips. Doing a fair amount of fast alt-picking the bevel starts getting slanted a bit after a couple hours of play time. So I only get a few hours out of each pick since I really do prefer the stock "even" bevel of the brand new pick.
The JP-trinity picks, which I also like now and then just for the change, have a flow tip/bevel and are obviously made of a better tougher material (I think ultex maybe) because they take much much longer to wear.