I don't know if it helps but I have 225/45x18 on the front and 255/45x18 on my car and even though it is on lower springs (about an inch) I've not had any rubbing.
When I bought it it had CSL Reps fitted with 235/35x19 fronts and 265/30x19 rears that didn't rub either so I would have thought your second option ought to work OK.