Too late now, but the upper trim lines of the Grand Cherokee offer a variable ride height with a button push.  You can feel it change significantly, and if you raise up high and then forget to lower it once back on the pavement, it will lower itself back automatically (based on speed).

 

The OEM tires are great for highway and city driving, and just ok offroad.  But swapping out wheel sets is a royal pain, unless you have easy access to a lift.

For beach cruising, it works for me just airing down the tires at the right time.  But I don't take a shiny black SUV out into the woods or over rocks.  For that I'd want the new Trackhawk so I can skip over the rough spots at 150mph.

 

I test drove all variants of this car, and I have to admit that Trailhawk was the best one. Close second came Limited with 18" wheels. I decided to go with the Limited + Lux Group 2 for one main reason: off road tires on Trailhawk extended it's breaking distance. so I preferred safer truck over cool factors. Lux 2 gave me ventilated seats which I wanted.
I will see how this car performs so far 3 days, I like it.

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I liked the trail hawk a lot but ended up getting a summit in diesel.