I would also suggest a 350/3500 in what ever model you choose as well. Any of the Big 3 have a truck that will do the job. I take it by saying "Powerstroke" that you are looking at diesels? I would strongly suggest one for that weight, especially if you are going to tow quite often. I would not say that the Ford is the weakest one out there. All 3 have their little flaws. Ford just produced its 500,000th 6.7L this week.If you are talking about the 6.4L Ford, it has its flaws as well with less than average fuel economy and EGR system but by no means is 'weak'. Dodge now has a world class transmission behind its Cummins now that people are really enjoying. GM has the Duramax/Allison which is a great truck too. My advice is, if looking used, is to go to the dealer of each and test drive each of the trucks you are thinking about. Go online to all of the forums where these guys/gals hang out and you will learn LOTS about the trucks. Both good and bad. Dealers in your area is bound to have a used diesel truck in each of the Big 3 on the lot. Go drive them and get familiar with each. Good luck in your search. I hope you find the 'truck' that suits you well!