[habbie]

as with anything consensus is never an easy thing to achieve especially when its all based on hearsay and 3rd party accounts.
i sell both, i would tell you to choose the one that fits your budget best, depo has made huge strides and as some eluded our very own and exclusive gen4 are of excellent quality, there's an 85+ page 2500 replies group buy thread on BFC with over 700 buyers and not one complaint, that speaks volumes. most complaints and horror stories stem from people buying their depo on ebay from a vendor who also sells dresses and luggage and has no clue nor any type of basic understanding in either cars or lighting systems.

most if not all depo sold on ebay are seconds or factory rejects, i deal with this type of situation on an almost daily base, buy your lights from a light store, buy from someone who knows your car inside out.

the zkw are an original BMW part, they are somewhat pricy but they are a very good investment, either way both are light years (no pun intended) of the atrocious stock headlight BMW has been kind enough to curse us all with.

at the end pick the ones you can afford, pick an hid option if you really want to improve your lighting and never look back, either one is a great choice.
you can review the available packages and order here,
depo:
http://forums.bimmerforums.com/forum...postcount=2107

zkw:
http://forums.bimmerforums.com/forum...&postcount=561