That might look cool. Then you should lower it, too
I'm like 99% function, 1% form. For me, on the street, my typical approach is to find the smallest, lightest wheels I can find. Same on my 911. From a performance POV the only benefit to the 20s is going to be *slightly* better turn-in response. With 17s or 18s, you're going to get better ride, and likely a bit better accel/decel responsiveness w/the lower weight. Also better pothole, curb, etc protection.
I don't know if anyone has weighed them, but my guess is the 20s on the Limited are HEAVY boat anchors.