Not 5th gen specific...but almost every 4x4 I've owned I put front bumpers on in the very least. Stock front bumpers crumple in accidents and do very little to protect you and your occupants. Plus aftermarket bumpers are easy to mount lights and winch on typically, and can give you more clearance.
A few years ago I was cruising along in my Jeep Rubicon and some turkey hit the brakes at an intersection with a green light. I locked up the Rubicon and pitched it sideways like the Dukes of Hazzard, all the guy needed to do was slowly creep forward a foot or hit the gas as he should since it was green light and there would have been no contact....I skidded up and kissed the trunk of this Lexus and it caved in all the way to the rear deck. That car was totaled. My Hanson front bumper had a paint mark on the hoop that goes over the winch, that was it.
Thankfully no one was hurt. As lady luck would have it we pulled off into a gas station, he was acting all weird, and asked me how much cash I would give him to fix his Lexus. I said pay you in cash? I have insurance, and I still am confused why you stopped at a green light. I tried to hand him my insurance card he said he does not like dealing with insurance. Then he asked if I thought he would get pulled over if he drove home with his car like that, I said yes most likely...but if we call the cops they will probably give you some paperwork and let you limp it home. He said he did not like dealing with cops. I said I was a retired cop and if we call them the accident will most likely be my fault because I rear ended you and did not give myself enough room to stop, so if they come you can get paperwork from them, probably drive home, and my insurance is gonna cover your repairs. Once I told him I was a retired cop, he shook my hand said he was in a hurry and hauled a$$ out of there....I called my insurance immediately and explained it to them, they laughed and said we will not be hearing from that guy.
Shortly thereafter I put a Shrockworks bumper on my 3rd Gen...peace of mind should anyone else slam their brakes in front of me.