If you already have 17x8 wheels, hopefully you have good tires, because other than racing school, wheels and tires are the single best improvement you can make to a car's handling.
Think you are Goggles Pisano and have a good set of tires (not the cheap chit just to have a "stance")?
My suggestion would be:
Springs from an 07-09 Speed3
Koni Str.t shocks & struts
Adjustable rear swaybar (hotchkiss, racingbeat, whiteline, etc)
That will keep your car as a nice Daily and still give you improved handling for some very spirited driving, auto cross, fun.
Coilovers are a waste of money on a DD, trust me, YOU will be the only person who likes to ride in your car, and even you will tire of the bone jarring setup.
Especially when your girlfriend dumps you for the dude with a stock suspension cuz she is embarrassed to roll with you.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.