Since I'm a stock type person, I can't really help much. You would have to rely on the feelings of those that have made some level of change out there. OEM from GM sources, would cost about $431 with a 1 year warranty. A company with a TYC brand for $306 with a lifetime warranty. A company with a *Action Crash* name brand for $260 warranty unknown. Spyder brand name with upscale versions of the OEM headlights, for about $320 to 380 (I guess, based internal color etc) with a 1 year warranty. It sure would be best to look at, an study all companies that make and supply G8 headlights, not knowing how tricky/fancy you might want to get.