NL 811 plus 2015F350 SRW+Airbags...now what sway bar?

Bigwig gets my vote. I have them on the rig in my signature which made a dramatic improvement in handling. While the rear was the most bang for the buck, I don't regret installing the front, which also helps, just not to the degree of the rear. With these sway bays installed, cross winds really don't affect handling substantially until in the 40 mph range and by then I've already parked the rig until things settle down.