Need Experienced help choosing rear locker '92 4X4 P/U

Hello friends!
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I have a '92 extended cab pickup. 3.0, 5spd manual, 4WD.. This
vehicle is stock except for a 3" body lift. I would like your
recommendation on a rear differential limited slip unit. I'd like to keep the
current gearing. Cost is a factor but not so much as drive-ability and reliability.
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About how the truck is used; I drive it daily on streets and highways but
also use it extensively off-pavement, mostly mud and soft sand.. time to
time I do take it up and down some steep rocky inclines.
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Thank your for your time and help. Here's my Toy!
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http://photos.imageevent.com/bigtuna/field5/truck_5671.jpg
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Gus.

Thread title says you want a locker, the text says limited slip, which do you want ?

OOOps, you are right.. I think I want a limited slip.. but please do make any recommendation.
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Thanx!

If you use the truck as much offroad as you say, I think you'd be better off with a locker than a LSD.
For the difference in cost between an LSD and a basic locker, a locker will give you much more for your $.
Install price for each will be about the same. There's all kinds of lockers, from a good but simple one like the Aussie, to a more hardcore like the full Detroit, to the ultimate like the ARB or e-locker. Do some research on them and see which best fits your wallet and needs. And speaking of $, the Aussie is on the low end of cost and the ARB is on the high end, not including install costs.

I'm pretty sure I need a (selectable) locking differential.. The prices of these (including the Detroit) are within my budget..
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If anyone has any first hand experiences or tips to share about specific brands or installation tips (or traps) please join in.
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Thanks a bunch!