I know there have been a lot of threads about LED bulbs for angel eyes over the years, but I don't see too much specific info on products that is recent. I took a stab at these from ebay for my 2011 X35i, and they aren't bad for $28:
2X H8 2 CREE XRE White Angel Eyes 10W Daytime Running Light DRL for BMW E60 E70 | eBay
They aren't great either. I had the $15 GP Thunders before and they were just OK. I know (from experience with my E90) that LUX is a nice product, I'm just feeling cheap