i dont know if your still looking but i would get a durmax the cummins is a awsome engine but its wrapped with dodge..the powerstroke burns up to easy with upgrade the new 6.0's and there also wrapped with furd and i think duramax and chevy is a great set up my dad and i own 6 of them and there all running strong some in the 500k miles range and no problems all have tuner chips and lifts and tire....
Just my 0.02