A new F-150, regular cab, 4X4 about $25000 in Calgary. Box length 6.5'; 8-foot box available. Supercab 4-door, 4X4, 6.5' box about $29000; employee price abt. $26,000; 8' box available. Price depends on how hungry the dealer and salesman are.
If your old one is still good, wait a year for end of year deals, but harder to get exact model you want. Or shop for a 2009 now.
You sound like a confirmed Ford customer; I prefer GM but that makes no never mind.
I like the Explorer as a rental in the southwest (AZ, NM) but that is because I want gear and purchases under cover, sometimes another couple along, and I don't need truck capabilities. One case where I prefer Ford to Chevy.