So I'm thinking of moving up in size. Would like to be able to tow the boat home for the off season. The trip is a little under a 100 miles and mostly flat.My tow vehicle is a GMC HD 2500 4x4 with a 6 liter. Now i was mainly looking at a 270 but my wife is looking at 290.I have a choice of Highway or state routes that are also good traveled roads.