I'm looking for a newer superduty f250 supercab diesel 4x4. Any advice as to what to look for and not to get. I know some about these things and I'm leaning toward the 6.4 but the new truck price is making me look at used. I was willing to pay $36k for an xlt but an extra cab with a 40/20/40 seat is hard to come by. The Lightning needs a big brother.