Question for the 4X4 geniuses! looking into a 3rd gen 4x4, pretty much awesome condition everywhere, but mileage is at roughly 100K ... I've heard on pretty much any 4X4 at 100K you might not want it... I know I know it all depends on who cared for those 100K and all, but in general, what have the experienced 4X4 people experienced about this?