If the current crop of Nissans are remotely similar to the old(and from what I hear, they are), get the nissan. My '87 nissan shortbed has 220,000 miles on it, and runs like a champ. I'm the third owner, and got all the records with the sale. No troubles, except it didn't like CA gas. Once I got to Oregon, no worries. Only routine maintenace so far, except a new starter at 210,000 miles.
I'd love one of the new crew cab frontiers, or a titan, but every time I look at one, I think about that car payment with full insurance. If I ever need a "new" truck, I think it'll be used.