Congrats on the new Jeep. You definitely found a gem that is sure to make a lot of Jeep guys jealous.
Don't think about suspension as offroad use vs on road use and that if it's good offroad it can't be good on road. You seem new to jeeps so just wanted to make sure you know that now.
Next, Currie, Savvy Offroad (who sells curries suspension stuff as well as their own products), and Metalcloak are probably the "best". If I had to pick between Currie and MC, I'd go with Currie for suspension components. They are what everyone compares new products to as either not as good or "just as good as Currie". As someone mentioned above OME is a very good lift as well. I run their springs and sport shocks. The only thing about going with OME lift is they only sell springs and shocks. So you'd have to buy the other components from a company like Currie, Savvy, or MC. If I did it again, I'd get their springs, but probably a different set of shocks. They aren't bad, I just want something different, which could be chalked up to the fact that I just like to tinker with my jeep a lot.
As far as lift height goes, the world is your oyster really. With the longer wheelbase of the LJ, you don't have to worry as much about drive line vibes with a 2-4" lift. At this point, what lift height you need really depends upon what size tires you want to run. If you want to stay on 32" tires, a 2.5"-3" lift is perfect.
I'll finish this long winded post with a question. What do you know about lifting a jeep and do you know all of the parts needed? The first step to lifting a jeep is understanding why you need more than just springs and shocks.