The stock 18s on the RX8 are 8" width front and back. I was going to purchase aftermarket wheels, but I would like your opinions on this before I do anything. Would 9" front and back be good width for this car, if not, what would be good width. Please give me your opinions.

I've seen postings of people using 9.5" in the back, can't remember if I saw larger..

EDIT: Found these recent threads
http://www.rx8club.com/showthread.php?s=&threadid=17027

http://www.rx8club.com/showthread.php?s=&threadid=17286