I've not tried the FMJs, but have been shooting Easton ACCs for years. They are by far my favorite arrow, like TRAP said, best of both worlds. Not cheap though.
I've found ACCs to be pretty tough, I've broken a few in circumstances that would break any arrow and had them survive many hits that I though would destroy them. One thing I like about them is I think the aluminum layer offers a bit of protection from the explosive nature of damaged all-carbon shafts. I found one ACC that had the carbon cracked for half the circumference about 2" back from the point but it never broke. I have no idea how many times I shot it in that condition.
Something that is rarely mentioned in arrow talk is the nocks. The g-nock that is used with ACCs is another thing I like about them. Small, consistent, and come in two sizes to fit different servings.