I likes them all!
First, I'm suffering from a stomach cramp from the humor in this thread...
Second, I have all three trucks: 1st, 2d and 3d Gen and like them all.
The first gen W250 gets the best MPG (18 - 19) empty, but drops way down pulling my 20' enclosed carhauler w/ about 7K (drops down to 9 to 10 mpg). I've only had my 1st gen 93 about 5 months and no problems (133K). Straightpiped sounds good. New Monroe Gas Magnum shocks... gotta wear seatbels just to keep from hitting my head on the roof just running down the highway.
The 2d gen 3500 only gets 13 to 15 empty (it weighs 9,800 empty) and gets around 10 to 11 pulling 17K lb 5th wheel. I lost the VP-44 at 35,600 miles and got it replaced under warranty. I had extended warranty and fried the transfer case at 69,800, also replaced under warranty.

BD 4" exhaust... sounds the best IMHO and flat hauls butt.
The 2003 3d 2500 gen gets almost 18 -19 and gets 15 mpg pulling the carhauler. I almost hate to even mention no problems yet. Aeroturbine, sounds good, my second choice. I like the ride the best,
So, if it says Dodge and Cummins, I like it!
Wiredawg