Hey, thanks everyone. It really did help to hear differing views and experience. We're getting the Silverado 1500
with the 6.2L Vortec engine. I think the added HP, torque, and payload over the capacities of our Titan will be good for us and our Airstream. The truck will have comfy leather inside, and a practical utility rack in the bed. Loading kayaks and bicycles will be so much easier. We'll post a photo soon.
I'll try to explain, or justify, at least some of our reasoning. First, our 22' CCD has a GVW of about 4500 lbs, and a tongue weight of about 600. We've not had problems towing with the Titan, but have sometimes wished for a bit more power when climbing. We shouldn't need 403HP often, but it will be there.
We seriously considered the gently used 2009 GMC 2500, but in the end, the off-road suspension was a killer for us. Those of us that love our 22' CCDs worry about frame flexing and the hard ride would not have been good. The AirSafe (or is it AirRide?) hitch does sound like the way to go, but another $1K or more -- not at this time. Our dreams of a larger trailer are just that at this time -- dreams.
I've not heard from one person with an Eco-boost that gives anything but rave reviews, but there were no 2011 models available that met our requirements -- Lariat, 6.5' bed, and max. tow. The other drawback in northern Vermont is our local Ford dealer, while we're doing business with a very reasonable Chevy dealer.
Rednax, we need 4X4 -- we live about 2.5 miles up a gravel road, and especially suffer during mud season.
Again, thanks to all. Wish us many smooth miles, and happy trails to you,