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.
Have had decent luck with aftermarket headlamps on various vehicles over the past few years. However, found it nearly impossible to get some vendors to disclose what actual brand will be shipped due to them carrying a wide variety of manufacturers. Currently having issues with oxidation on both of them and miss the old glass enclosed Xenon (now LED) headlamps that were far less inexpensive, but sure lasted a heck of a lot longer.
If you want easy plug and play, stay o.e. If you're willing to spend money, get a set of Spyder or Spec-D lights and have them PROFESSIONALLY retrofitted with high quality Morimoto projectors, then run either a high quality HID kit (TRS) or LED (Opt7). The optics in the aftermarket lights are garbage. I personally run retrofitted Spyders with HID, but if I were to do it over today I'd probably go with Spec-D with LED.
Do anyone else have this issue with this plastic panel near/under the passenger side wheel?
I saw another parked G8 the other day and noticed that this panel was sagging as well.
When I was last under the car, I noticed that this panel looked like it would sag but I didn't see an extra hole...