You will want at least a one ton dually, diesel. All three manufactures make good products. All three have there good and bad points. So, it's pretty much a mater of preference. You most probably do not need 4 wheel drive unless you plan on towing your new 365 through mud holes. You also do not need an a low rear end given the astronomical horsepower and torque these new diesels have. (A high rear differential number = low rear end.) Not getting a 4 wheel drive and a low rear end will give you a little better mileage. I would also recommend getting a factory installed under the bed 5th wheel hitch assembly option (Ford and Dodge offers this. The 2015 Chevys and GMC do not, maybe 2016 models will.) The cost of getting an under bed hitch assembly is actually less than having rails put on after market. I own a 2015 F350 now and have had an F250 and Ram HD2500.
I now have a B&W hitch. I am really impressed with the quality of its construction and the ease in which it hitches and, more importantly, unhitches. I have not noticed any chucking with this hitch even though my rig does not have an anti chucking attachment.