I am in Las Vegas, Nevada and wheel in the desert a lot and have never had any problems. I have had the bumper on for...2 years now...maybe 3.
As for the winch, I have a Warn M8000 but have also seen the SuperWinch and Mile Markers on without any problems. I am pretty sure you could get away with any winch on the market...if you go for the powerhouse Warn you would have to do some modifying though.
Just as a heads up I was wondering the same thing with the bumper but all has been good and it has saved my jeep on at least 2 occasions already
1-Carpet roll hit at about 70 mph, it fell off the truck in front of me, very interesting and about a 7 on the pucker scale.
2-a friendly driver wanted to back into my jeep at about 25 mph, no damage to me...he was not so lucky, lol.
It is truly worth the money and I would not think twice to get it again or on any other vehicle.