Which Shift kit to buy?

[5.0 Pony]

I am gonna go with the transgo kit myself. But i have a B&M In my Bronc and it works great. But ive heard somme good things about the Transgo kit so im goin with that. MY B&M Kit is installed in a c6 behind a 400 4 bbl, and it is starting to slip a little, you can hear it grind when you let off sometimes. But im new at this whole shift kit thing, let me know how yours goes.