If you're really looking to push out you wheels more, I usually suggest breaking out the tape measurer to see how far you want the wheels. Obviously some people will want the wheels pushed out 5mm more or 20mm more, it really just all depends on the person.
Do that first (or look at wheels in person) to see what looks the best, then go with that set up. Don't worry about the front being more than the rear, as it's really for looks more than a real performance gain (unless it's a 100% track car)
