selectable locker vs limited slip

[turboL]

im lookn at for parts for my 01 dodge ram, and im on traction devices. i was looking at the prices for a detroit locker versus a arb air locker, or an eaton e-locker, and they are pretty far apart. is the selectable locker worth the extra money, or will a limited slip work. this is a mud truck/ trail rig, with a good bit of time being spent on the street. i ran it thru the pits and mud drags last year with no problems