This is truly Dodge's best truck they have ever made. It had a very "solid" feel to it when driving. Hemi power is a must, you won't regret it. I like the quad cab because it is cheaper, only downfall is the seats are not as comfortable as the crew cab seats.
Hemi power and the MDS system. The ECO light lets you know when you are running on only 4 cylinders. This system saves a great amount of gas. I have the quad cab ,4x2, 5.7 hemi, 3.92 rear axle and average 17.5-18.5 all around.
Make the steering a little thighter feeling. Especially on highway driving truck seems to have a slight "drift". Make the back seats of the quad cab a little more comfortable for long trips.