I can't wait to see the numbers on the diesel Ram 1500. I'd get a Cummins if i had to have a new heavy duty diesel. The ford 6.7 seems to be great with a chance of HPFP failure and getting stiffed on the warranty. $10,000+ to fix. The duramax has the same pump but GM seems better about warranty replacement.
I love diesels as much as anybody else, but the price of fuel, engine premium, and the decline in durability makes me second guess them. If you get one, look into extended warranty coverage, keep every fuel receipt.