I've recenty started using the Wilson NXT Tour and I have to say I'm quite pleased with it. It has a somewhat gritty feel to it that really bites into the ball, and frays, rather than breaks outright.
If I find I become dissatisfied with it, I'm going to try Gamma LiveWire.
If you hit hard, string a little higher, and you'll get more control.
NOTE: The views expressed in this post are not necessarily those of the author.