Sierra's and Silverados are basically the same thing... Sierra's just cost a lot more.

I'd go with the Silverado Ext.... More room then the F150 (If you are sticking with half tons), and its not goofy looking like all those "king cabs" and "double cabs". My bro had no troubles hooking up a 4horse trailer half loaded with his 1500, so I don't think your boat will really hurt either... just observations.

I've noticed Ford engines are pretty badass.... But thats about the only nice thing about them. My ranger is always having electrical problems and I had the seat rail just BREAK on me while I was on the freeway... nearly wrecked and Ford got a nice letter from me.

Curtis