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I like 255/40/19 on the stock sport wheels which will provide a smidgeon of rash protection and a better ride while making the car even more sure footed in all situations, only draw back is approx. 10% range loss.
So, you're worried about curb rash, but are willing to chance trashing $2000 (I'm guessing; also am not counting the wait to get them) in wheels for a $400 tire cost difference until your tires become worthless on the used market and worn out.