Going back to gasser based on needs (need advice)

Our 2008 V10 is rated for 14.5k...The new trucks with stronger engines and better transmissions should be even better.

If you aren't into drag racing up hills, the new gas trucks should do just fine and as you said, no way will you make back the up front cost of the diesel based on fuel savings.

My only hesitation with the Ford 7.3 is it's a new engine and may still be in teething mode...I would probably lean towards the Dodge unless you plan to wait a while to see how the 7.3 holds up.