i came across a wheel fitment chart on google. im posting so that anyone thinking of rims from another bmw, or even aftermarket, can use this as a reference to be sure the rims will fit. unfortunately the chart does not include the e90, e91, e92, and e93.
i hope this helps some ppl out as a quick reference.
source:
http://lh4.ggpht.com/_iLNhm6kv__4/SW...nt%20Chart.JPG