mkaresh wrote:I don't think having the offset wrong is necessarily dangerous, but it will muck up the handling and put additional strain on the wheel bearings and other suspension components. So I wouldn't do it.
It also depends a lot on the amount of offset difference! For example, installing a 2006 M35/45 Sport wheel on a 2003/2004 M45 is almost certain to contact suspension components - even without turning the steering in the front!
BTW, I definitely agree that spending the right amount of money on the tires is absolutely the thing to do. I'd much rather stick with stock wheels and buy the best performing tire I could get - that greatly increases the handling/braking/etc. (wet or dry) of any car! The "look" of the stock 18" and 19" rims is way good enough that I see it as a event when I see people spend thousands of dollars on "better-looking" rims. But, to each their own, I suppose!
Z