Which lowering kit
 

So I want to drop my 2015 road king as much as possible in the rear. I've looked at blocks and burly slammer shocks, which do you all think is the best bet for a noticeable drop w a decent ride. Also, I like the idea of air suspension for lowering it, but have no clue how much I'm looking at for parts and installation. Any help and pictures would be awesome

I lowered the front and rear of my wife's Sportster using the Burly kit and I am extremely pleased with their product. The ride quality hasn't changed much from stock, unless you hit big bumps, which is understandable. My wife is 5'1" so we really lowered it. If I decide to lower my Road Glide, that's the route I plan on going.

A problem not often talked about using blocks is the shock angle. I've never used them myself, but in many threads it's been suggested that that using them over the long term results in elongating the swingarm bushing.