I've been thinking of doing something similar. Most of my jobs can be done from a small truck, and I would use the bigger when I need it.
My brother has a extra cab ranger, auto with a 4 cylinder that has really impressed me. Great milage and a really nice ride.
In the 80's I had a Mitsubishi mini truck that was one of the best trucks I ever owned. 4 cyl, man transmission and power steering. My brother bought a similar Nissan that just wanst in the same league. That's one of those vehicles I should have kept!!!! Sadly, I don't trust Mitsubishi anymore.
Edmunds.com has some decent reviews. I like to read them when looking at vehicles. I avoid the car magazines, they are all about what is great about everything and ignore the flaws so they can keep the company ads.
With all the incentives, and it being something that you will be putting some miles on, I would also consider buying new.
Good luck, its always tough to decide what is the best of anything.
Eddie