This. If you know that you plan on doing something different and better (axle swap, re-gear, etc) it makes the most sense to save your cash and do it the way you ultimately want it the first time. Throwing a single penny at a D35 is a waste of money IMO. At least with an Aussie in the front of a D30, you can sell it once you upgrade the gears if you choose a different locker.
Selectables front and rear is the tits, and I'd recommend ARB over anything else, both from personal experience and collective opinion shared here.