They're hard to find and I had to drop everything and make a cross state run to buy one as soon as it popped up for sale but the duramax suburbans/yukons XLs are awesome. We found a used one last summer with 4WD, RST package, and max tow. Best SUV we've ever owned so far. Incredible fuel mileage, plenty of cargo, smooth ride, and effortless torque for running up mountain passes out west or hauling our RV. Routinely get 27-30 mpg on the highway and 20-23 in mixed driving. When towing I've gotten 13-16 pulling my 24' bunkhouse RV.
We have 3 in car seats and went with the captains chairs this time. We had another suburban with a 2nd row bench. The bench was better when they were all rear facing or unable to do their buckles. Now that my older two boys are forward facing and can do their buckles we put their car seats in the 3rd row with my daughter rear facing in one of the 2nd row chairs. That leaves and open 2nd row seat that another adult passenger or my wife can sit in on longer road trips.