datguydeni, the pic above with the projectors in the OEM sized housing is the pegasus lights.
NorCal MR2 Pegasus Headlight Conversion
They come with H7 halogens. If you want HID's it's $225 more. You'll loose high beams with this though.
You could do an H4 conversion housing and throw HIDs in there. If you stay with an H4 halogen bulb with these, you'll keep high beam. If you go HID, you'll loose it. If you go this route, get a good glass housing like Hella or cibie and not that plastic housing ebay crap. The plastic crap can get moisture and the heat of HID's will melt it.
Honestly, just get Hella or Cibie H4 housings, some good H4 bulbs and call it a day...