i have owned a lot of dodge diesels, i think the first one was 89, then 90, 92,95,97,99,00,05, and i have 2- 07 now..
i would go for the late 07 with the engine brake and 6 speed , if you pull alot of trailers. i trade mine around 100k cause other little stuff starts going wrong.
alot of guys i know like the newer automatic, i just dont trust an auto for pulling big loads.
i had a new ,buy the way i have bought all of the above trucks new. any way a new 6.0 ford , stay away from 6.0 fords, everyone i know has had problems with that one..
i run all of my trucks stock . thats against the law in Texas isnt it

,, anyway you will love the dodge 5.9 or 6.7