Hi, Ok I am very new to Beemers, and wheels, so please be patient. I just got rid of my 2001 Mustang convertible ( it was junk) and leased a 2004 325ci with the premium package. It's two days old, and i LOVE it!, I am not fond of the stock rims though. I want to buy the M3 rims (18inches) off of ebay and just slap them on my car.. can i do that? Do I need to go to someone to have them installed? Basically my budget is around 1200 for the whole story (including tires) - HELP Please!