Thinking about buying a "newer" truck - any advice?

Thanks guys I had no idea about the spark plug and head problems with the Fords. That sounds like a PIA that I don't want to deal with. I'm not looking to spend thousands on repairs on something that is already expensive to me. The trucks look nice but I'd rather avoid something like that.

What engine would you guys recommend out of the Dodge trucks? I'd like to sit around 20mpg with a V8 if possible. My commute to work is mainly flat highway driving but I can't really just put put along at 60mph without getting ran over.