You are correct... the steeper the angles the quicker the parts will wear. One of the few reasons im currently running the OME with a bit of extra lift is because I have the ability to swap suspension components with relative ease.

Though my biggest concern is the steering rack. Rack and pinions, by design, dont do well with thrust loads. They're lower maintenance than traditional steering linkage setups.... but not really ideal for how most of us are running them.

I think you'll be very impressed with a superlifted commander offroad.... and with the size of your family that JK will probably sit for a while lol.