[waGoN]

Well, here is my suggestion, and it's going to be vague.

I have driven Jack's Dodge dually with the Cummins, and it can pull a house down. You've seen the size of his trailer and everything that gets loaded into it. The truck does a nice job, and can keep the speed up on most hills, just not the real big ones.
Bob Vautrain has a nice Chevy with the Duramax. I have also driven that. I had my small trailer on it, and you couldn't tell that it was there. That thing is a power house, and Bob had the tune only on the first setting I believe.
That truck will also pull down a house.
Ford?? Don't know

Me? Well, I bought an older GMC that has the 6.5 diesel. The 6.5 diesel is the underdog of the diesel world. It has the same hp rating as my 5.7 gasser, and not much more torque. When I got it, it couldn't pull down a shed. It had a problem with the vacuum pump that operates the wastegate. Fixed that, and now I am confident that I can pull a shed down. These are under powered compared to the other brands, but with a little finesse and some upgrades, you are supposed to be able to get them up to the hp/tq numbers of a stock Duramax. I like mine, and with the minor upgrades I've done it does well with my 28' enclosed with my car and some stuff. It's not fully loaded, but I know the truck can take more, and there are more upgrades I can do. The best part of the 6.5 powered trucks, is that they are underpowered underdogs, which means you can get them for a decent price and even with the upgrades, you are still doing good price wise compared to the others. You just can't pop in a programmer and get another couple hundred hp/tq like the others though. Unfortunately.
One other thing. My mileage isn't any where near what Jack and Bob can get from theirs. Although, a new set of injectors will probably fix it, but thought I'd throw in that little tidbit.

So, it depends on how much you want to spend, and how much you are going to use it. If I had to do it again, I'd probably find another 6.5. The DMax is real nice, but you pay for it. Alot. The Dodges are powerful too, and are cheaper than the DMax.

Well, that is all I have.
Anyone else??????????