I was in your position a while back and was deciding between GMA and Satterlee Arms (Hein was not in the running because I wanted a true Mag Mauser action). I chose Satterlee Arms. Stuart is a very talented machinst and gun maker in his own right. His actions, to my eyes, are like a work of art. They appear to be better finished then a GMA action out of the box as well which means less money you have to pay to your gunsmith for polishing work.

If I needed an action asap, I would likely go with a GMA. If I could wait a bit longer I would take a very good look at Satterlee's actions.

http://satterleearms.com/