Max Motorsports makes top quality stuff. I love their STB, but also had a Kenny Brown STB that (IMHO) was of equal quality. However, the KB unit would not work with MM's CC plates, so I ended up buying MM STB (and selling the KB). My point: Its not just the brace -- you should also try to factor in your longer-term modifications (and potential clearance issues because some after-market cold air kits are not compatable with certain STBs). With those things in mind, I'd recommend MM because everything they make is great -- at least I have no problems to date, nor have I read about any.
Good luck!