I need some info on the aftermarket headlamps floating around on the internet such as these:

http://www.360tuners.com/03-upinfini...pairblack.aspx

Does anyone have any experience with these? Will they work fine with the OEM xenon setup? Are there any OEM looking ones (non-black) since the Infiniti ones are ridiculously expensive.

 

Search the forums, there are numerous threads about these headlights.
Those headlights do not support Xenon or HIDs. They're halogens only.
They're very cheaply made and those who bought it weren't satisfied.
On top of that, the description is poor. These will not fit all G35 sedans '03 and up.
These will only fit 03-04 sedans. 05-06 sedans have different shaped headlights, those won't fit.

 

paint your's yourself and seal them up and they will be fine and much better quality than aftermarket.