I have 17x7's with 40 series tires with a 3 inch drop(about). They ruba little and i modded the fenders alot. So 17x7's would fit but i wouldn't go bigger or wider. Not saying you couldn't make em fit but 17x7 i think is the widest i would try to fit.
I've settled my choices down to a 15-16" rims on my car. I'm worried about putting 17's on it and having to work on the fender or get rubbing problems. Definitely going with 7" wide wheels though, love the fat wheel look on an MK2.