How much weight will you be hauling? If you want to improve ride quality I would go with the deavers and a shackle. I have been running the 6" skyjackers no blocks for a few years and am mixed on them. They can hold more weight than stockers with less sag, but are not that drastic of an improvement on ride. I have never tried the deavers, but if they can hold up to desert jumping they should be able to haul the occasional load without cracking.
In hindsight I think better ride for daily driving would be worth having a sagging rear and slowing down a bit when hauling if its not all that often.