I think the GX would be mostly a non-issue once you get some 35s or 37's on it and a bit of armor. In stock form - it's probably going to leave a lot of paint and plastic on the rocks on anything much beyond a fire roads.
Once nice thing about the older rigs is how good the geometry is with 33s and a 2-3" lift. I have 13" under my front skids and the sliders are knee high (never have hit then on anything). The off-road geometry is better than a 4-door JK with the same tires and mild lift. The back could be better, but a bumper would fix that. 37" is a LOT of tire and will have significant changes for the negative in acceleration and braking compared to a 33", plus the extra weight can over-stress things.
That being said, I could still see a 550 in my future due to the unicorn combination of a 9k tow capacity and wheel-ability. That could allow comfortable towing on a 6k camper, which the older rigs could never do ( sans a 200).