Not trying to kill anyone's sale, but you might want to try your 19" wheels for a few weeks before you go to the 21. I was just like you and gung-ho to change my incoming car to 21-inch wheels.
I live in California where the roads are much, much better than Indiana (went to school there) and the 21-inch wheels are going to take a beating there. I go to Lake Tahoe fairly often here and the roads on the way up have some really bad stretches where the 21-inch wheels would really take a beating.
Someone on here once said that the 21-inch wheels are for vanity reasons, which I'll totally own up to, but give yourself a little time with the 19-inch ones, they are super resilient compared to the 21.