I bought a pair of Depos off ebay. In my case it was a lot cheaper than buying the Hella as they are about 300 quid each here. The DEPO xenon cost me about 150 quid a pair and came from Germany to the UK incl shipping. I then stuffed them in the suitcase to Doha.
The build quality is not as good though as the originals and I remember I had to cut incisions to fix the ballast to the underside.
I think one of the main points is that it is a pain if you need to flatten the beam pattern. You have to take the high voltage supply off and stick your fingers in to get to the lever. The adjuster on the originals is a lot easier, you just remove the rubber protector at the main beam.
I did a comparision on these back in August, I'll try and find the link.
It is too early for me to talk about the adjusters as I've not had these lights on very long.
Regarding my beam pattern, my drivers headlight is a bit wonky, but causes no major concern. I think this is due to the cheaper manufacturing and therefore not all holes lining up properly.