Get the hand adjustable shocks and you won't regret it. In 2012 I installed standard height shocks PN 540000-08 on my 2009 SG. The ride was way better compared to the stock air shocks. With the stock air shocks I was always pumping or bleeding air to get them set and the ride was never the same one day to the next. With the hand adjustable shocks I could actually feel the rear suspension travel and working.
I've run both the 12" and the 13" Premium Hand Adjustable shocks on my '14 FLHTK.
The 13's are FAR superior.
I was under the impression that the Limited comes standard with the premium hand adjustable shock... Like the SGS. But 13" instead of 12". I can't imagine the MOCO would put air shocks on their LIMITED. I guess nothing surprises me anymore. Not hating, just genuinely curious... And possibly dumbfounded.