I have both OX and ARB.. Here's my take
Electric: Too many lil moving parts to ef up at the wrong time.
OX air:Mine is cable, the air OXs I have seen have an external air cylinder.. Probably looking for damage at some point.
ARB: Works great. The install is a PITA though. OX, and the Detroit I had were easier to install because the shims are inboard of the bearings.. Just need test bearings to get the setup correct then install the real bearings. On an ARB the shims are outboard and are a pain to get everything in place. Plus you have to deal with the lil air ring. Other than that I prefer the ARB..
Pull my finger