Selectable lockers are a bit more agreeable because, well, they're selectable. Turned off they're equivalent to an open diff, and they can be turned on for as long or short as needed, so you're not abusing the front end by default but rather by intermittent choice. In winter -are you from Canada or just your Avatar?- in winter, a front auto locker is about the worst thing you can will on anyone who might have to engage 4wd in traffic. If you thought the side-slip was impressive with a rear locker, wait til you get up to 40 and the front one decides to load or unload. It turns a commute into an adventure.
If the lock-rite is in good shape you might as well run it. Unlocking one hub is generally regarded as the poor-man's selectable locker.
I'd probably try to sell the lock-rite and put whatever I got for it toward a TrueTrac (LSD) or ARB.
