I was thinking that too... My friend has a 530i and he's getting new wheels, offered me a good price on his 20s. I just can't imagine how it would look. I guess I'll stick to my 18" idea. I just hate the fact that I can't afford wheels AND tires right now and I need new tires. My stock wheels have a small dent in them and they are a little scratched up... I guess once I can afford the 18s, I'll just have my current wheels as a back up set of shoes.
No real mods... just loads of maintenance