I also had the e-bay specials Clockwork posted. Albeit, I had them about 6 or 7 years ago on my e39. They lasted less than 1/2 year.
Then I purchased 2 sets from Umnitza. One was the ICE 5 the other ICE Vxx. Both sets are still working today. They are maybe a smidge brighter than the e-bay specials, but there is definitely a different quality. The e-bay is lacking the term "quality". One set from Umnitza ended up in my e53.
On the e39 boards were different members that tried improving the light output of the stock AE's with different solutions, like this one (
here's the thread with the build):
The best was done by a member from Japan, who moved States side, and relocated a HID bulb in the OEM AE bulb housing, like this (
here's the post). The light output is close to the new e70. The AE bulbs from e39 and e53 are different, but the e39 fits in the e53 housing (not sure if vice-versa works too - I didn't have to try it):
Here's the Youtube vid with HID angel eyes:
HID Angel-Eye - YouTube