Well, it looks like I don't need new tires yet.

I spoke to the dealer about choices when I do, and his recommendation was that I should stick with Michelins, and it was ok to downgrade to a slightly lesser rated tire, since I wouldn't be driving the Autobahn anytime soon. He said Michelins have a "patented tread" that wears better than most other brands.

Again, I want to thank all of you for the great input!