The biggest factor in whether your setup will rub is going to be offset. Do you know the offset of the wheels you are looking at?

Also, I assume you have a little uncorrected negative camber in the rear, and that will help the tires tuck in the wheel wells on those hard corners or over bumps.

I have the same setup as you (but mine is 99), H&R sports, with 18x7.5 My buddy does as well, but he has +42 offset, rubs occasionally, so I got +45 offset, and I've had no problems rubbing at all. When I jack up the front to change oil, the rears tuck in the fenders, so no problems.

Basically all this rambling just means you'll be safest with a +45 offset.