I had the Auburn Pro in my rear 10 bolt for about 4 years before switching over to 14bff w/ Detroit. The Auburn was perfect for street driving, but every time I went off roading I saw its weakness! As soon as you lift a tire or have one tire with little contact pressure, it's all over - wheel spin out!! Brake modulation helped sometimes, but most of the time it didn't. If you plan on wheeling any decent trails you will probably want to move up to a larger axle anyway with a Detroit. But if you are mostly stock, then I assume you will be staying with the 10 bolt rear, so a Detroit might be pretty hard on your axles...hmmm...well, I did DO a lot of cool trails with the Auburn, just not as gracefully as I do now with the Detroit and ARB, so I guess you would be ok...
My best advice is to really sit down and think about what you want the truck to be (now and maybe a few years from now)...if it is going to remain pretty much stock and you do more street driving than hardcore off roading, try to stay with a Auburn or other LSD for their great street manners and slightly improved off road capabilities (vs. an open diff)....if you plan on getting hardcore and don't mind the occasional "quirks" of a Detroit on the street and want ultimate traction off road...that is what you really need to decide!