I adore Bighorn synthetic saddles. I have two actually. One is my kid's saddle for the kids I teach lessons to and the other is for me.
I find them to be super comfy and secure. They also fit my horse well.
I don't know anything about King Series synthetics so I can't really be helpful there, sorry!
Mine too, Mango! A black, square skirt Abetta all around saddle but I used it mainly for barrels. I will say that I ride MUCH better in a leather saddle for things like reining and WP, but for trail, barrels and hacking it's great. :)