Firehawg
Sorry about your wife's TL - I got lucky - yes I do have those sport wheels too - but my dealership does a "tires for life" program as long as you have it serviced there. I have had a total of 2 full sets of tires. Not sure if the 20"s will be better than 18"s in the big pot holes - I've seen lots of tires and wheels damaged from horrible roads.

Good luck on the wait -