Just to compare a few other vehicles here is a cut and paste from the Motor Trend test of other SUVs. Its easy to see that the JK with kill the Xterra and FJ on the RTI scores.
Fourth Place: Our "Trail Rated" Liberty had a not-too-shabby 450 RTI result, but had the smallest tires of the group (225/75R16) with the least aggressive tread. Gearing is adequate, but the clumsy slot-machine 4WD lever puts up a fight when going into and out of 4Low.
Third Place: The Xterra scored a 384 RTI (lowest of the four), but did offer a big tire (265/75R16) and an electronic locking rear differential (some called it the "Save Me!" button). The 4.0-liter V-6 is powerful and responsive, making the Nissan a favorite in the high-speed sand washes.
Second Place: The Toyota FJ's suspension uses coil springs in front and back and scored a solid 491 RTI. The "A-TRAC" traction-control system calculates the right amount of traction needed in high and low range. And, although it's loud and vibrates like crazy when engaged, several testers appreciated the A-TRAC's feedback. In addition, the FJ offers a push-button rear locker (which disconnects traction control), and runs the dry-wash trails like a Baja pre-runner.
First Place: With the most compliant suspension, the H3 scored a 521 RTI and has a transfer-case low-range gear almost two times lower than do the others. In addition, the Hummer had the biggest, most aggressive tires (285/75R16) and a smart traction-control system that works in combination with a rear locker. If there's a weakness, not surprisingly, it's the anemic I-5 that had trouble pushing our 2.5-ton H3 through the desert sand washes.