I've only been in mine so I'm bias. It is the 2.5" Tuff Country Spring Pack. To tell you the truth, the ride doesn't seem any different from when it was stock (always been a pretty stiff ride). And yes, whatever you go with, add a leaf, spring packs, or shcackles, I think they are worth it if you don't like that front end sag. Here is a kit before installation and some after picks.
I do have several hundreds of pounds in the back for winter driving in the pics, so that is why it looks like the front is tad bit higher then the rear.