Join Date: Oct 2012
2011 Tucson Limited FWD 2.4L
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I just did a projector retrofit into my OEM housings and don't regret it at all. Price was about half that of buying the projector headlight units like your eBay link. However, there was a fair amount of labor that went into the project.
If you plan on using halogen bulbs in those projectors, I can't attest to effectiveness versus stock reflectors. If you are planning to use an HID kit, you will probably want to stick with a lower wattage to prevent heat damage to those projector drop-in replacements you put in your post.
As for those particular lights, I have seen a post on this or another Hyundai Forum from someone who installed an identical looking set, and he loves them.