What are you trying to achieve? Are there obsticles that you are encountering that need more articulation? Or is it an issue with sag due to the added weight of overlanding stuff? Or do you just like to have the tallest rig at the mall? Just kidding with the last one. The first thing I would advise is to keep in mind that lifting, even when done correctly, leads to premature wear on other components, which translates to more risk of problems on the trail.
For companies, Terraflex makes good components as does Metalcloak... beyond that, it will all depend on the purpose.