i have a turbowagon with the 17x7 volans running 215-45-17 bridgestone s02 up front and 215-40-17 out back. the rear haven't worn out yet, hence the difference in size. i have bilsteins and ipd sport springs and haven't had a problem with rubbing. 17x8 seems a bit large imho, u could alleviate some of the offset problem (if not enough) with some spacers. as for bilsteins, i really like them. the 850 is already stiff, but bilsteins don't make it that much stiffer, and i like how it feels. especially if u keep the stock springs. springs is really what makes the car a lot stiffer.

btw, if u do get a chance to roll the fenders, would u consider getting 225-40-17 (it's the same diameter as stock 205-50-16) and letting me know how it feels? and if it rubs?