Since you mentioned you are not well versed, I'll point out some basics...
First of all, there are different types of lockers: Selectable lockers, automatic lockers, and limited slips.
Lets start with limited slips: they are not really "lockers", but they are traction aids. As the name implies, if a tire slips, they do not let all the power go out that tire, but rather limit the speed diferential between tires and apply SOME power to the wheel with traction. However, most of the power will go on the side with no traction (in most cases, but it will finally depend on the LS itself). Limited slips are not so bad on road, but are not so good offroad either, as they offer less traction than a real locker (but are still better than an open differential). They are kind of a middle of the road compromise, in my opinion.
Automatic lockers, as the name implies, lock on and off automatically. They tend to be cheaper than selectable lockers, but they do have some down sides, particularly, on road manners (here I am generalizing, but the road manners will depend on the brand of locker). Depending on the brand, and automatic locker can cause your Jeep to change lanes suddenly and unexpectedly when accellarating (if you are not used to driving with it), and can make clicking noise that are loud enough to scare some passangers.
Selectable lockers basically mean that you can select to have your axles locked or open (in some cases, open is replaced with limited slip). They come in 3 main varieties: air (AIR and the new OX), cable (OX) or electronically actuated (ECTED and another one I cant remember right now). ARB and OX basically are locked/Open, so that means that the Jeep will behave on the street just like it does with open diffs, but you have the option to lock the axles at will. In the case of the ECTED, they actually dont lock the axles, but rather vary the proportion of the limited slip as far as I understand, so that the proportion is very low when "locked" and much higher when "unlocked". For me, the choice is basically between OX and ARB, as both have passed the test of time, and I prefer the selectable lockers to the automatic lockers (This does not mean Detroit is a bad option, just that I prefer the selectable part)
For your choice, you need to consider what you want to achieve with your lockers, how much you want to sped, and, if you still have the D35, what you will do about the rear axle (D35's in stock form dont like to be locked up; they can granade on you if you have large tires). In my case, I went with alloy axles on 30 splines (and still, it is not considered a strong axle!) and used ARB lockers both front and rear. I am very happy with my decission. The down side of the ARB is that you need an additional air compressor to run it, but since I wanted OBA anyway, for me it was not an issue, as now I can fill up my tires after leaving the trail...
Felipe
