I'd suggest the LCR (obviously). Mate of mine has a 325Ci, its a nice looking car but doesn't exactly stand out from all of the other 3 Series. I guess that could be a good thing in the long run though!
Other than that, maybe an A3/S3. ST220 is also a good shout! If you want something smaller, maybe an ST170 Focus?
Might wanna read the whole thread rather than just the OP as he has just got an ST220.