All DEPO headlights are exactly the same in terms of quality and which vendors sell them.
There are however minor things about the DEPO headlights that require a trained eye to help "better" them so they work better than just out of the box. These are minor things but we do take care of them.
As far as the best, nothing beats OEM in most cases, however the P46s with the FXR retrofit retrofit are the best - but even more expensive than finding a used one on eBay.
One other major consideration is what you find on eBay sometimes has quirks that are overlooked because it's "OEM" - stuff like bad seals, broken tabs, and ultimately you really don't know what you're getting when it's used. Be careful, shop around, and if you have time, give us a call.