Is anyone out there running (or planning) to run winter tires on their 20" wheels? Seems like most either have or plan to switch to 19's for the winter. I was originally looking at the Michelin X-Ice, but @Worldwide Beagle has enticed me to look for performance (I'm in the Colorado front range, so often dry pavement in the winter). The only other option I can find that fits the 20" are the Pilot Sport A/S 4. Those seem like great tires, but I figure if I'm going to change tires for the winter that going A/S is a half measure I'd end up regretting. I was hoping to avoid the hassle of swapping between 20" and 19" twice a year. Any recos for us 20" 'tweeners?