sweet rig, and i would start with rustys for a good overall start

 

I wouls say investing is some quality bumpstops would be one of your best bets for helping protect you Jeep when traveling at higher speeds off road. But as jim posted some higher quality shocks will also help immensely. Obvioulsy adding some lift wouldn't hurt either, judt to give you Jeep a bit more suspension travel to soak up those bumps. I like the job you did with the POR-15, very nice!