I bought this '06 Ram Diesel when it had 51000 miles and it runs great. I changed all the fluids with synthetic but am staying with Delo 400 15-40 for the engine and changing it every 5000 mile along with a fleetguard filter. I added an AFE stage 2 intake, BD tranny pan, and Smarty Jr. Recent trip from Denver to Seattle averaged 19.7 mpg unloaded at average speed of 70. Did not burn a drop of oil. The dealer changed the ball joints and u-joints when I bought the truck. I can see these are going to be a weak area but the Cummins diesel can't be beat. I was a Chevy person for 30 years and even though I loved the Silverado I will drive this Dodge till it won't go anymore.
Looks, Cummins Diesel, fuel mileage better than gasser. Roomy front and rear seats. Turning radius. Ease of checking and servicing fluids.
Build a beefier front end. Switch to an Allison Tranny. Seats could be more comfortable.