There really isn't a bad choice there. BAT, Kelbly, Defiance, Hall, Stiller, Borden, etc., they're all capable foundations for a match winning BR rifle.
Personally, love my BAT L 2x10" action. Also got a Barnard and a couple Nesika Bay's I like as well. I would be more inclined to research which action was
readily available when you're ready to purchase...unless you're looking for specific features that not every action maker may offer (ie, drop port, RB/LP/RE or ?).
-Rick