From looking at your pic of your boat. I would go with a diesel. With that much weight the ride and the wear and tear is much easier on a diesel. I pull with all kinds of trucks and the diesel is by far the best. By the way I still have my 2001 excursion w/7.3 that I will sell.
I have never heard of a v10 getting anywhere close to 20mpg. 10 maybe and it gets the same towing or not. If you really are getting close to 20 then I would never sell that truck. It is a one of a kind.
I am a wholesaler and have pulled my 29 outlaw with many different trucks. If you go with a ford diesel don't get a f-250 with a 6.0. I used one this year and it sucked. The best ford I used was a 06 f-350 dually and a close second was the 01 Excursion with the 7.3. The only thing that I don't...
I don't think I have done to bad considering the first year with the boat and the major changes that were done in a short time. I am looking forward to next year but its sounds like you my not even have your 29. Good luck with what ever you decide.