You can fit a 9.5 ET27 up front, especially if you're willing to dial in some camber. Depending your tire size and how much camber you go with, fender roll may or may not be required.
This is @3002 tii car running 17x9.5 et30 w/255's up front:
@all4bespinnin car running 18x9.5 et22 w/255/35 up front:
EAS car running 18x9.5 ET22 w/265/35 up front (with lots of camber):
Hope that helps!