I think the Ram might be the best bang for the buck in the year range you are choosing. You can get a loaded 4-door 4x4 Ram for under $30K.
I bought a used ecoboost F150 and love it. Love hearing the turbos sing! Heck I think it's quicker than my 02 GT lol and get almost 15mpg in the city and 17 on the highway. It's not breaking any records in the mpg department, but it's good enough for a truck. I'm looking forward to throwing a tuner on there as well, supposed to really wake them up and increase mpg's a bit.