well, you need to get the Hella Quad Headlamp conversion (euro spec if you want the headlights on the insides like these). They replace your whole stock light housing. They are also projector lamps, so you get a much better spread of light on the road. Next, paint them to match your car if you want to... most people do. Then install or have them installed. If you want HID lighting like I just did, you have to buy an HID retro-fit kit in bulb size H7. You can get any color you want (white, purple/white, blue/white, or blue basically). Mine are purple/white like an acura. They are anywhere from $350 - 500. They replace the low beam bulbs and there is a little box that runs them called a ballast. Its about 4x5", not very big. However it is very high in electrical current so have these installed by a shop as to not zap yourself.
Its a quick, cheap install. Then you have what I have. You can skip the HIDs; the hellas improve the stock setup a lot with the halogen bulbs included.
Oh yea- McNews has the Hellas for $385
here it is scroll down till you see hella euro spec projector headlamps