I've got superlights on mine, and I like the look of them. But if you go fairly low, you will find you will have to do some guard modification to stop scrubbing, if they are the wider offset.
I think there is a hilux lsd that isn't too hard to obtain. It's out of the early 2wd utes? I haven't done much research into it. I did do a little research into t series difs though, and found that I could by mech lsd centres second hand pretty cheap. And the t series difs aren't hard to find. Depends on how much mucking around you want to do. Problem is buying a second hand lsd dif centre for a t series you don't really know what condition it's in untill yuou get it.
I'd be more inclined to look into the hilux dif.