I just put a set of LTX Michelins on my Silverado, but that's a little big for your fitment....
You're having problems finding a lot of info on the X radial, since Michelin only sells that particular tire through "the clubs" (Sam's, Costco, etc).
My Sis is on her third set of Michelin tires (the original Michelin XW4's, a set of Michelins from Sears, and now the X's) on her Subaru Outback that has nearly 200,000 miles. She couldn't be happier with them. Between the second and third sets of Michelins, she had a set of Goodyear tires on it, and couldn't wait to get rid of them. In fact, her high satisfaction with Michelin tires led to my decision to put the LTX's on my truck.
With an 80,000 mile warranty on the X radial, and a top test rating by CR, I don't see how you can go wrong.