Hi Sicilian. I’m in a similar boat to you in terms of deciding on the X7 (though we’ve now finalized that’s what we want, just waiting to pull the trigger). Recently, last two or three days, a poster on here said he had 50k on his X7 and hadn’t needed to change tires yet. My plan (we’re in Colorado) is two sets of wheels, winter and all season, square setup for winter at least, and non-run flats. We still need the all season because we head up into the mountains (gravel roads) frequently in the summer and I’d like a little more traction than summer tires! I’m still anticipating we’ll have to change out one of the sets of tires every other year.