I have a 2005 ESV Platinum, and when I purchased the vehicle I had the dealer switch out the stock tires with 20" Michelin LTX Mud/Snow tires (a suggestion from this forum). I have a very steep driveway that gets a fair amount of snow and ice in the winter and needed tires with a better grip. I want to purchase a 2008 ESV with the Luxury Package which comes with either the 18" or 22" chromed aluminum wheels. I have a few concerns about the 22s. Are the stock tires "grippy" enough? Are the 22s going to give me a comfortable ride compared to the 18s?