The Michelins have a softer sidewall, and will tend to "bob and weave" more than most other tires. I am partial to Bridgestone tires, but it is probably more because of my ties with the company than them being a whole lot better than any other. The "rounding" is because of the new 4 wheel independent suspension. You should get the alignment checked when you get your new tires, no matter whose tires you wind up with. Most factory-set alignments are off a bit.
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.