Not to burst your bubble, but I seriously doubt it. 7" is about the widest that would fit without a lot of mods. Even then, you will have to be careful with the backspacing. Take a look at this page:
http://www.danielkorb.com/ghiawheels/
I believe these are 16x7 wheels. He had to mod the bolts and the bump stop to make these fit. Also, notice the wheel spacer he used on the fronts.
I am going to try 17x7" Porsche:
http://www.wheelenhancement.com/inde...lDetail&id=142
These have a backspace of 55. I think that with very little work these will work with 205/50/17 all around. Really, even with 235/50/17 you are only gaining maybe an inch tread width. With these light cars, I'm not sure how much more actual road holding you will get with the larger tires? Check out the specs of different tire sizes here:
http://www.tirerack.com/tires/tirebran.jsp
If you look up a brand of tire and open up the specs you can see the wheel size and tread width along with the section width (sidewall to sidewall).
Other than looks and bragging rights, which is important to some people, I think it is very much overkill. I am planning on a true daily driver so I think what I put on will be enough. I am running Porsche 2.0L Fuchs with 195/60/15 all around and you wouldn't believe the improvement over the standard 165's.
Take care,
Kelly (Cohibra45)
soon to have a Raby 2.9L roller cam