Don't put a HID or LED bulb in a halogen housing. It's illegal, gives poor light coverage & blinds oncoming drivers. HID bulbs that fit in the same socket put off light in different parts if the bulb than halogen filaments do. The reflectors don't focus properly for that different location. The resulting light goes all over including in oncoming drivers eyes, but not necessarily where you want it.
I put projectors & HIDs in my Tacoma & am happy with them. I did to heat the housings in the oven to remove the lenses, cut a hole in the back & epoxy in the new projector housings. It was $500ish or so to do it right.
Also don't get a color temperature above 5,000 Kelvin, preferably 4,000 kelvin. Below 4,000k is yellow. 4,000-5,000k is white. Above 5,000k is blue or purple. The human eye is optimized for sunlightn which is something in the 4,000k range. Above that you get more glare, eye fatigue & less usable light per watt.