I run the triax. got it off ebay, barely used for $75 bucks. Be patient and you can find lots of good deals. Handle is really nice...I have it on the lowest setting...steeda reccomends you install it on the highest setting but I think that's only due to reach issues...I'm 5'10 and don't have any problems with it with my seat all the way back. Shift is smooth and precise.
The pro 5.0 is nice, but I prefer the B&M shifter over it. I've always wanted to try the fidanza piece though...and I don't know if anyone is using it here