Hey guys, I'm pretty sure that I want to replace my aging Yukon XL 2500 with the Titan XD as my next towing vehicle. At 37 ft of total length, I know I'm at the far end of the spectrum. The pro-4x appeals to me because we usually Boondock when we camp....skid plates, hill descent and locking rear may come in handy. But I don't know that I really 'need' those features and I'm not sure if I will actually take advantage of them. The SL though has the running boards (wife is 5' 2") and seems to be a little cheaper. We use a WDH of course. Our trips can be well over 1000 miles. Any thoughts on which trim level may offer better towing stability at highway speeds? The pro4x and the sl have different shocks and tires, right? Looking at low mileage 2017 or 18 so will probably have the factory tires on it still. Not to say that the shocks and/or tires can't be replaced if one version would be head and shoulders above the other. Thoughts?