I used to shoot HHA and I have nothing bad to say. Great product, great customer service. I don't have any experience with the Black Gold, but the guys who have them RAVE about them. Thought about trying one out myself
Another for hha I've been shooting the king pin since it came out an I won't be changing anytime soon Sent from my SM-G930V using Tapatalk
I like my HHA's. I have been shooting the Optimizer lite for the past 5 years and recently switched to the King Pin. They are easy to set up and built to last. I don't have experience with the others you mentioned, but I am sure they are great sights as well.
I have two HHA sights. Love them. Never used Spott Hogg though so I cant really give you an objective opinion.
If you are going single pin the HHA wins. I however like the dual pin you can get on the Spot-Hogg sights. The HHA pins are bright. Both sights are solid performers. I shoot the Fast Eddie with dual pins because I can shoot fairly accurately out to 40 without moving the pins. Good luck.