I have the Rokmen tummy tuck plate on my TJ, and I like it a lot. It shaves a good bit of room off the belly, and is tough as hell. Very well constructed.
With the extra room it gave me, I have yet to bounce off any of the rocks I used to. Also, it ties in nicely with the engine/trans skid they make (at least it does for the JK, they don't make for the TJ yet... as soon as they do, I'm buying one).
Nice solid welds, and a great fit. Very well made.
Also, the guys at Rokmen are great to work with. I'm sure the other people are also, I just don't have experience with those companies.