for $700 I would take a retrofit a million times over. If you've ever driven on ebay headlights.... <--- it's pretty much that. Ask customlightz, xenondepot, or anyone who's used them in the past. The quality of the light output...and just everything about them is seriously not there. Hopefully someone else who's had ebay replacement housings on other cars can give their .02
Don't do it. I have had really bad quality headlights ordered from ebay on my old pontiac. The materials used are not of the highest quality. They were projecters just like the ones in the link. Never delt with this seller but like Webby posted not worth it. I had trouble getting the adjustments to posion the lights high enough adn output was nowhere near what the stock headlights were putting out.