Update: Just pulled the trigger after a couple day negotiation process with an area Ford dealer. Will complete deal on Friday for a 2016 F-350 SRW Crew Cab Lariat, Diesel, 3.55 axle ratio, 172 WB and lots of bells and whistles (woohoo). Have loved my E-350, but it will be 16 Years old, and time for something that will pull with ease.
One thing I found out in driving a few was the longer wheelbase was a much smoother ride than the shorter WB. Got the long bed, which I wanted, but the drive confirmed.
Thanks for info and all the great learning on this site. I've been researching a long time and this is probably the perfect truck for us for the next 10 years at least. Now....Saturday I'm going to the Leer Factory Direct Store nearby to pick out a shell/cap.
DW said Yes!