I've had fiberglass, ABS plastic, and polyurethane CTR front lips. I have to agree with everyone else, DO NOT BUY FIBERGLASS! Mine cracked in 3 places. The only thing was it fit very well but that's not guaranteed for all fiberglass, they're actually known to have fitment problems.

ABS plastic also has fitment problems but it will not crack unless the impact is very big. My ABS plastic lip never cracked. It didn't fit perfectly though, but it was close enough that normal people couldn't tell.

The Wings West polyurethane front lip fit the best and was durable as hell! It could take a pounding without no damage. I bought it for $160 and it was worth every penny. Too bad I sold it