My trailer has a 1400lb tongue weight. I put a set of Timbrens on my '12 F-250, readjusted the WDH and couldn't be more pleased. Very solid feel, installs easily and doesn't affect the no-load ride. I don't think you can go wrong with any of them [air bags, Timbrens, RAS system etc] if you decide to enhance your rear suspension.
2012 Eagle 320 RLDS
2012 Ford F-250 Crew Cab FX4, 6.7l PSD
3.55 E-locker, Timbrens