they have buddyclub and BW kits in urethane now. xenon kits are also urethane and fit perfectly. ive got a xenon urethane front bumper. they come w/ life time warranties from warping and whatnot... i got it cuz it looked nice and no one else has it and its not made in fiberglass....yet and also cuz its durable.
you should be fine w/ a fiberglass kit if your arent dropped too low and know your way around.