I think this thread pretty well proves that every company is making a pretty good truck these days. I love my new and old Sierra's, but I've driven pretty well all the late model halftons out there, and was impressed with all of them. It does seem like Ford is making the most fuel-efficient gas v8 right now with their 5.0 L, but I can't stand the way they look lol!
If you're buying used, pay more mind to how well it was taken care of, not what brand it is.