I have the '07 2500 Quad Cab SLT 4X4 with the 5.9L Diesel not the new 6.7L. It rides like a 3/4 ton truck but turns like a 1/2 ton. The inside is a truck interior not some amalgam of luxury sedan and big rig. I'm driving on the I-5 daily doing 70- 75MPH as well as Cali stop go traffic and averaging 16.5-17.5 MPG with 500mi on the engine. First tank was 492.2mi for 32 gallons of diesel(34gal tank) and that was with me enjoying the power of the truck, that works out to 15mpg. As the engine breaks in my gas mileage will just get better and that's important in California when gas is $3.30 but diesel is $3.15. For a daily driver I'm pretty happy!
Economy for the size and power. Simple yet functional and durable inside, lots of storage space. Engine engine engine!
Make with spray-in bedliner. Tires and rims are puny. Having tires and rims that are more proportional to the truck would be nice.