This is very interesting. I have a LLY Duramax. So far the truck is nice, but they are needing a reflash and some injector replacements. Other than that, I love the truck. ONe thing you might want to consider though, I have a Edge juice w/ Attitude, exhaust and intake.....Allison trannys can't handle the extra power, so if your gonna juice it, get ready to spend another 2k to get the power down....One of my friends just bought the new 6.0 Ford last night. Traded in his '01 Ford powerstroke w/ 7.3. He had it in the shop 3 times in 3 weeks, mostly starter, turbo, and sensor problems. ONly problems he's ever had, but happended all at once. The new truck seems like a nice truck, sits lower than my Duramax though.... He has the 250 3/4 ton...not much for features inside. He said it rides way better than his '01 Ford diesel also...My other friend has the Cummings... He thought he was going to smoke my Duramax w/ all that claimed hp.... Then reality kicked in when I was leaving him at 15mph and just kept going...He's not to impressed w/ it performance wise, but still likes it overall, so far he's had that one for almost 2 years now w/ no problems...My father in law has the older Dodge ('97 I think) had a lot of problems w/ fuel pumps, turbos, etc. He bought a gas GMC this year. He won't ever go back to Dodge..
So to narrow it all down, they all have their nitches right now...I'd wait another year or 2 or just buy a gas motor especially where diesel is more than gas. Right now all 3 diesels are upgrading the technology and need to work the glitches out...Good luck.