If you want standard GTI Halogen reflector headlamps, you'll need to make sure they are GTI ones as they have a black inner housing, while all else have silver.

Otherwise you could buy the HELLA Halogen projector aftermarket lamps, which are identical to factory ones as they make them, and put a HID kit in them. I've done it for years and people ask if me they are OEM Bi-Xenons. I have a write up in the DIY section.