Beefing up a 727 trans!

Now where did I see that before... oh yes, a Mustang trying to outrun a tuner. Ok here is plain and simple of what I want in my transmission: reverse manual valve body, strong, maybe trans brake, wont blow up, and most importantly cheap (not looking to spend 2000 on a trans). So we got TCI, Cope, ATI, rebuilding it and not having my leg. Anything but the last one will suit me fine just want everyones opinion on whats the best and why. Thanks guy!