Might help to give us an idea of what it is your are wanting the action for. Lots of variables for hunting alone, but then add in target / competition shooting adds another level.
I use 4 custom actions:
Favorite all around: Defiance for smoothness, weight savings, trigger/cam timing and variable lengths.
Zermatt for cost , variable lengths and changeable bolt heads. (~850$)
SOLUS for cost, changeable bolt heads and shorter bolt throw.(~700$)
First custom was a Tuebor Ti for cost/weight savings and trigger timing.