Ryce, both of those are awesome wheels. If you can afford it I'd go for the BBS LM's. Forged lip and center and look absolutely awesome. Have you seen the pics on here of LM's on the E90?
On the other hand the Works are probably cheaper and look a little more "bling" if you're into that. Either way these mesh style wheels will loook sweet on your car. What color do you have btw?