I have a 2011 tundra with the OME suspension. I like the truck but wouldn't buy another one. My gas tank is 25 gallons and I get about 12.5 around town. Toyotas idea of a rear locking diff is a joke. The rear diff is open but the brakes are applied to the spinning wheel in the hope that the other one will gain traction. All that does is twist the axle shift and cause other problems. In a muddy or snowy field it is very noticeable.
From what the OP is describing I would look at an F150 with a 2.7 or a Ram with 3.0 ecodiesel.
