After for lurking around for a while, I may have decided to pull the trigger. I am looking to buy a 2016 Dutchmen Denali 307RLS. I can tow with the F250 without being over weight (on the higher side, ...
Go with the 350. Don't make the mistake of forgetting Payload and only looking at towing capacity.
The trailer you are looking at has a GVWR of 12,200 lbs. That's about 2,200 lbs of pin weight...then there's the hitch and passengers, etc. all count against you PAYLOAD rating....go with the F350.