Johnny pretty much summed it up. I intended to do the 4 spd but they discontinued them early this spring after some failures at KOH in Feb. The prediction of when they come back out, how well they will work and what the backlog waiting time would be drove me to go ahead with the 2 spd. I've had to rebuild my transfer case a couple times in the past year. The first time was a stretched chain and the second was a realization that all of the internals (bearings and planetary) needed replacing. After all that, I still ended up breaking a front 1310 output yoke on my last outing. (an upgrade to 1350 isn't practical on a 27 spline)
BTW, thanks to Dale @ Ironman for the corner guards.