good topic, just trade it mine in for the 08 Denali fully loaded. My jeep had 37k miles and i had mine tuned, it was fast and a blast to drive BUT by far the most uncomfortable SUV ever. Solid rear axle + stiff sport suspension + 5000lbs dont well at all (at least here in Michigan roads). I had to replace the trans output shaft once and the rear end start winning, i had extended warrranty so that took care of those. They are very solid trucks and solid engines, the t-case is faaaar from being a problem, i launched mine more than i can count. They are 70/30 tq split with awd on demand meaning the front tires ONLY kick in when the rear loose traction. The 6.1 is a beast but horrible, i mean horrible gas mileage i have seen as low as 10mpg in the city. I traded it in for a few things i hated:
1) very small suv
2) no spare tire for long trips
3) small gas tank+very bad gas mileage = fill up every 3 days
4) not very comfortable/very bouncy BUt the seats are nice
if you have a bug SUV already and want a toy i say go for it