This is one of those questions where you're probably not going to get a definitive answer. Personally, I like the air lockers (especially for the front). I just don't like having the front axle locked while driving on icy roads, so for me a selectable locker is a must (Air-locker, E-locker, OX-locker, etc...). A Detroit for the rear is great, although you have to get used to the ratcheting sound when making a tight turn as well as the occasional Detroit bang and hop. If you want to beef up your front axle, ARB makes a 30 spline locker which allows for stronger shafts (similar to a Dana44). Just my opinion... others will certainly differ.