It seems crazy that you can’t choose the 20s or the 21s with the performance option. I like everything except the 21s
I heard the ride comfort and noise isn't as bad as you think on the 21s. They look sweet but I agree its overkill for sure. The problem would be eating through tires every year and paying a pretty penny for replacement. You cannot rotate staggard.
Me personally im coming from BMW with low profile 20s, so I probably wont notice a difference.