Another consideration... When you convert to the MUA5 (integrated t-case BTW, not divorced as the automatic is), that opens up the option for Tera-Low gears into the case.

Also something for the guys that are wheeling more and more and modding their rigs significantly.
Getting a t-case from an auto, would allow for the Tera Lows for you too, and the TOD does loose its advantages once you go slapping in a front locker (non-selectable), hubs, or any number of other mods.

Food for thought.