Darren, I only own a couple Single actions. A Colt and a Vaquero. An Old Army too, now that I think about it.
I think Stags look thier best on a single action, and, your picture, I believe shows that. Those are very attractive guns.
I bought alot of stuff from Ajax. When they did things right, it was very, very good. It seemed near the end, quality started to slip a little and, I heard some grumblings on the forums I frequent.
I think Grashorn would be my go to guy for stags right now. You pick the thickness, the amount of bark, everything. Really good to work with.