Shock extensions are pretty much shock extensions. Different brands have different ways of making them work but they all pretty much do the same. Links are a different story. You should decided how long you need them to be or get adjustable ones and, if you don't have an e-disco, you might want to look at a set of quick disconnects like what JKS makes.
I have a JKUR and love the e-discos. I am needing about 2.5-3" extension. I know with some of the components, like CAs, it's all about the joint, so I wasn't sure if there was a particular brand/design that was better for the links. I have read and been told that I can just pick up stock rear links to put on the front, but I am not sure if it wouldn't be better, in the long run, to just pick up extended links all around.
If it helps, I am trying to decide between picking up a Rancho 3" Sport kit and piecing together a kit myself since I have a buddy offering me his practicaly new stock Rubi coils/shocks for $300. You may have noticed me post a pic of my extremely sagging coils in another thread you've comented in. I already have coil spacers and bumpstop extensions. I measured the bumpstop extensions at 2", but the coil spacers appear to be 3". I say "appear to be" because the previous owner may have left the rubber isolator on top of the spacer, rather than on top of the springs. All I know for sure is the isolators are nowhere to be found, but I haven't tried removing the springs to find out either. This leaves me with extending the shocks, links, and possibly picking up a trackbar to finish out the kit.