Opinions on a drop kit or leveling kit

So, I know for sure that I want to lower my truck, but I can't decide whether I want to just buy a leveling kit (shackles or something of the sort) and drop the rear 2.5 inches or if I want to buy a drop kit, like the 2/4 offered by Mcgaughys. So, I was hoping some of you could offer opinions on which would be better to do, factoring in ride quality and every other little aspect. Oh and I will be running 22's....

Appreciate the help!