When I had a jeep, I went from a No-Slip (lunchbox locker), to a full detroit, to eventually an ARB. You really do get what you pay for (in that order). A full detroit is a set it and forget it unbreakable (within reason) carrier. I just got tired of the bad road issues (it was a short wheel base jeep that saw winter).
I will keep saying it over an over until I'm blue in the face. There is nothing better than an open differential for 95% of driving (when driven on road), and there is nothing better than a locker when off road (and in the need of it). Selectable is the way to go if you drive on the streets.
If anyone gets an ARB locker, if you properly route the air lines, you will never have a problem from -30 degree weather up to 120+... With their compact compressor only used for the locker, you will have a lifetime of locking/unlocking.