Originally Posted By Jday:
All three of them will do everything you need them to and more. That said, I drive a 2009 Duramax and love it. Everyone says the IFS is weak, but I've been all over the ranch, pulled other trucks and even a tractor out of mud, and never had a single problem. And that's with my torsion bars cranked up and bigger tires. If you're worried about the IFS, a set of tie rod sleeves will ease your mind for under $100.
I agree 100%. IMO, the Duramax is the best overall diesel on the market. I like the newer Fords, and recently bought a new F150, but still prefer the Duramax in the HD trucks. A Ford would be my second choice in a new diesel.
The IFS on the GM trucks is tough enough for any normal usage. You're not going to break anything without abusing it. I've seen a few problems with the IFS at truck pulls and such, but in a situation where you aren't grossly overworking the truck, you won't have any problems. If you're seriously hung up on a solid axle, then go with the F-250.
Although, OP, if you're not towing much, why do you need a 3/4 ton diesel to begin with? A 1/2 ton gas truck will be a lot lighter and more nimble when offroading and can be built to be just as tough with the money you'd save over buying an HD diesel.