X-ecutor. The one I have. Only 9 soldering points, and by far, the easiest to install.
Matrix (Xodus). It's a no-solder modchip. But you can only pre-oder now, it's not out yet.
Open Xbox. Just as many solder point's, and does the same thing as the x-ecutor. (this one is upgradable, but not as ez to solder)
These are not in any order (of greatness). They all do the exact same thing, and are the best ones on the market.