[Bad Dawg]

Grim,
You might be refering to my rig. We have the Rancho 4" and the 37" MTR's. We took it on the local dealer Hummer outing a couple of weeks ago and it went through all the course like a champ. What got interesting was the side hill course where ours was a little more scary than everyone elses because of the lift, but it did just fine. Any taller of a lift and we would have really been puckered up, although we love taller lifts because of the look. It is true that I measured the lift between ours and the stock rig next to us and the 4" lift was really closer to 5 1/2" not counting the tires (see picture). It all depends on how your going to use it. If you ever think your going to get sideways on a hill then you might want to think hard about how high a lift to go with.
Something else to think about. The taller tires really affect the performance of both the engine and transmission on the road.
One more thought, The 37/12.50x17" MTR's are great tires but I wish they were fatter! They look a little skinny on the H2 even though they aren't a "small" tire. They may even be a little skinnier than the 35" BFG Mall Terraines they come with.

You can never have enough horsepower! Yellow LUX, Airforce intake, stainless headers and exhaust, Gobi rack and ladder, roof mounted off road lights, full wrap brush guard, rear light guards, outside tire carrier, Rancho 4" suspension lift, Ultra "EN4CER" 17x9 wheels, Goodyear 37/12.50R17 MT/R tires, removed side-step bars, 9.5ti warn multi-mount winch.