If you go with the 24V Cummins, look for one with a manual trans & then
do the FASS pump conversion & larger 4" exhaust. I love my 2002 & it towed my 24'enclosed like it wasn't there, but the auto trans was the weak link.
Had to rebuild it at 100K because dummy me didn't read the manual & towed in overdrive. Trans shop did 12 mods that he said were the "weak link" & never had an issue after that... except when the 1 gen Edge controller I installed shorted out the electronics. Took out the PCM & ECM modules which caused the injection pump to go. $7K bill. So go manual if you can. A lot of guys like the 12 valve versions (1998 etc) seems like you can get a lot more power from them by turning up the fuel pressure.