[SilverHyBu]

HIDs work fine in the stock projector beam housings.
I tried higher wattage incandescents and LEDs before going to HIDs, so my advice is to go straight to HIDs and don't waste your time with half measures.
It's a bit of a project if you do it right, but well worth it.
You do need to add a relay harness to take the initial startup load of the HIDs off the headlight module, and you need to add load resisters so you don't get a "bulb out" warning.
I opted to go for a Phillips kit sold to the EU market. They don't sell them to the US because of an agreement with DOT to only sell DOT approved products in the US. I didn't want to make a modification to the car with a cheap Chinese kit, but some have reported good results with those too.
I think I put a link in the other thread.
I'm really glad I used a quality kit. Headlights aren't something I want to be screwing around with any more than I have to