mark
+1y
it all depends on your definition of a "good, smooth" ride. some will say that the stiffness of bag over axle is a good, smooth ride. but bag over bar is definately softer and smoother.
so any link setup, as long as the air springs are on the link bars, will ride softer and smoother than a setup with the air springs over the axle. im saying "softer and smoother" because the term "better" is shady. everyone has their own perception of better.
i'd recommend a 3link or 1 of the different types of 4links. the 6link is pretty much a 4link, but with the lift bars in the back. so those are good too, and will actually ride smooth from the factory, since they are bag on bars