I'm planning to go this route as well. There are other controls arms at a more affordable price and which may be less maintenance intensive than the uniballs. Also, the remote reservoirs look cool, but probably not needed by most people, so you could save some money there as well. Up to you.
As noted, unless you are constantly weighed down in the back, I'd stick with the regulars. If you are occasionally weighed down (towing, loaded with people, etc), might just want to plan to add airbags to supplement the springs.