Weight distribution systems, which one is best?

I like the Blue-Ox because it rides the best, due to the tapered spring bars. I'm not convinced it really does much for sway-control. The Reese Dual cam is far better at eliminating the bow-wave affect from passing trucks, but my van turns so tight I could bind up the bars against the hitch-shank. Can't do that with the Blue Ox so that was the deciding factor for me this time around.