mac07733,
I tow a 2012 R27 on a Float-On 12K trailer (electric over hydraulic disc brakes) with a 2011 Chevy Silverado LTZ Plus 2500HD Crew Cab Diesel 4x4, with the towing package, towing brake controller, towing mirrors, 18" wheels, and rearview camera system. This configuration provides the following features that are important for towing my boat/trailer configuration:
Exhaust brake system
StabiliTrack Electronic Stability Control System
Trailer sway control
Hill Start Assist
Auto grade braking
Brakes with Intelligent Brake Assist
Integrated trailer brake controller
13,000 lbs ball mount hitch rating
Since July 1st, I've towed about 1,025 miles from Apalachicola, FL to Lake Texoma on the Texas-Oklahoma border. Then I've towed about 1,150 miles from Lake Texoma to Lake Winnebago-Fox River in Oshkosh, WI. In a couple of weeks, I will make the return trip to Lake Texoma, with possible stops to launch in two different locations to motor about for a few days at a time. Next winter, I plan to tow to the west coast of Florida for a couple of months stay. Additionally, I have plans to launch all along the Gulf Coast of Texas to Florida and in many of the tributaries of the Mississippi and the Mississippi itself.
I mention all this to point out that my modus operandi is to trailer the R27 a lot, so I bought the truck that I think will do the best job for my particular circumstances. I suggest that your particular towing circumstances should dictate the type of truck to buy, BUT I would definitely recommend diesel and 4x4.
I couldn't be happier with this truck outfitted with the towing features that it has. I've never noticed it straining either at the boat ramps or on the highways. Stability and braking on the highways are excellent.