OK I'm gonna throw my opinion in here...
I know that people swear by doing it yourself, but I honestly think you would be much happier with new ones. I ordered ebay blackhoused headlights and they look phenomenal. Last week, just for kicks, I took my stocks and DEP-housed them. They looked great on the inside, but I did everything I could to get the lenses crystal clear to no avail. I used a kit that has sanding pads and lens restorer but they still didn't turn out that great. So if your stock lights are pretty pitted or foggy, I highly suggest getting the ebay ones because it makes all the difference in the world. Properly cared for, they will stay very clear and look amazing.