Locker in the rear is more advantageous, but then your pretty much limited to an LSD or selectable in a short wheel base wrangler........ this means $$$$.
Lunchbox upfront only makes sense because its A. Cheap B. an open diff when your not in 4x4.
In a perfect world we would all be willing to drop the cash for a selectable....unfortunately reality doesn't always make that the best option given circumstance.
I scored my Aussie pretty cheap off kijiji, it has been great. My e-locker wires have been ripped out, I have seen ARB air systems fail again and again
. Aussie has worked every-time flawlessly 100% lock 100% of the time still looks brand new after 2 1/2 years DD'ing and wheeling it very regularly. So yeah it plows and it kinda sucks on slippery roads....oh and in the right circumstance it walks around on ledges...which can be scary as crap, also slippery off camber conditions are a nightmare haha. Overall I'd say I'm still way ahead with the Aussie then without, just thought I'd post up the good and the bad.