I have the ex-cab and that is the only thing I wanted when I got my truck was the crew. Other than that it pulles perfect. I pull a tag along wieghing about 5k loaded. But a previouse owner pulled a 5're noticed by the grease stains and one rail left in the bed.
I like the 4x4. Not only is the extra traction nice, but when the truck squats from tongue wieght or a loaded bed, the wieght of that front axle will help with the downforce on the front tires.