Well I will say, I plan on putting down 700+ on the dyno down the road, and might throw some slicks on the car as well when I get serious about running some times (not anytime soon with the little crate 350 I have now).
Many people I have seen/talked to do great wit the truetrac... great unit! Im just building it up a little extra the first time and spending the money now, rather than MAYBE later (after I either break it, or want to upgrade again).