I'm looking to improve the ride quality and stance on my 13' Super Glide Custom. I'm only 5'7" - 150lbs so I would like to lower it but with Iowa roads being what they are I don't want it to ride any worse. Any suggestions?

 

As far as the front end, check out the traxxion straight rate springs with intimidator thread. If you want to lower it try sliding the tubes further up in the trees if you still want to keep a good ride. As far as the rear shocks, there are a ton of different options: ricor, works, ohlins, jri, bitubo, just depends on is much you want to spend. Search around for rear shocks there's a bunch of reviews and thoughts on here. Good luck

 

Being so light, you could get away with lowering it and not sacrifice "too much" ride quality, like an 11" shock or so. Or, what I did for a while, is use lowering blocks on the rear. That'll drop it, and give you a slammed look, but you're still getting a better ride quality than that of a 10 or 11 inch shock. My opinion.
But there are countless thread on suspension to read up on, to give you an idea what you can do. Good luck.