Blocks are for girls Jeeps.
Terra Flex or Rubicon Express.
Rough country sux!
So what's the low down on rough country
Rough country has a good price point, which is why many use them. They are WalMart quality. Serviceable but not much else. Depending on what you are doing and how much you want to put into the the Jeep, they may be just fine.
You should also be replacing tie rods, ball joints, etc. at the same time as they are probably worn and changing the angles will not be good.