Reiger is feckn expensive and IMHO looks like shit. but it's up to you. If you are buying an e30, I'd go for mtech I or II or combination of the two. the front lipp off the 318iS looks good too.
Big Daddy - I'm surprised yuo don't know rieger. Theymake several kits, the most well-known being the genesis widebody below:
see what I mean about it looking like shit?
Look on ebay or in secondhand goods newspapers.
Make sure you get the right one for your car (2 or 4 door, mtech I or II)