I prefer that everything be basically optional, by that I mean it should offered at a reasonable cost as what I would call an upgrade. Then either do it or not. In away it doesn't really matter, if they can do it, we can do it. The tire issue is interesting however, are they perhaps better rated, a completely different tire and can they be purchased in the USA?
Optional as in from the factory optional or as in dealer installed optional?
The Opel GT tire is FAR superior to the RS-A or GS-2 offered here. It's a true Summer only tire with excellent dry and wet traction. It is a tire than can be purchased here too.