I wanted a 6.7L Cummins but since I do not tow 15k plus on a daily basis it made zero sense.
If you run the numbers the 6.7L begins with a huge loss since it is $10k additional. Add the fact that diesel is more expensive compared to gasoline, a few extra dollars for maintenance, DEF, etc. I ran the costs side-by-side and the diesel does not begin to win until it is on the far side of 300k miles. If I required an awesome vehicle that could tow anything and worked hard every day making me money it's a no brainer - the diesel wins hands down.
Then again, for those who purchased the diesel only because the MPG numbers appeared slightly better, there are hundreds-of-thousands-of-miles to go before the diesel even breaks even.
And finally, I can pull in to any automotive shop anywhere in the world and the mechanic can wrench on my Hemi. With all the Class IV emissions on the new diesel trucks, service choices are severely limited. I really do wish I could justify owning a Cummins but for my application the 6.4L Hemi was the clear winner.
$10K goes back in your pocket on the back end when it's time to sell/trade.
Everyone seems to forget that.