There is a guy in VA that does a damn good job on retros. He did mine for under 300 in labor/assembly. You have to buy the ballast, another set of headlights, the bulbs, and the projector/shroud. It cost me about 800 for the complete deal and was worth every penny. On average it will cost between 700-1000. iobidder directed me on this guy.(99aznaccord) You can see his tread for the stuff he did here:
http://www.bwimports.org/forums/showthread.php?t=18

I have a 7th gen as well so if you have any questions, please ask. I know I had a ton of questions when I was in your situation. It took me almost 6 months to research and figure out what was the most cost efficient yet durable and clean for my Accord.