that blue car confirms u should go +12 the wheels are sunken, (yes i like agressive fitment) but understanding what you want getting the guards rolled is in no way negative and will not cause any issue to the car apart from give you more clearance which cant be a bad thing can it?
oh and +12 will look better so i dont see the benifit to pay more for worse offsets.
oh and think resale plus +12 are like p0rn people cant get enough