I had these lights, and I put in an HID Kit.
Few things to note:
1. The Halo's are only visible at Night (they are faint and not visible during the day)
2. The light pattern isn't very good
3. If you go HID, the bulbs are typically too long and throw light above the "cut-off," also the light pattern gets worse with HID's
So if you don't drive at night and you'd want this as a cosmetic change, then go for it. But honestly for practicality I'd avoid them.
I went back to my stockers, and kept my HID kit (I had to buy new bulbs as this light uses H1's not H9's - I think I got those numbers right)