As for the STR advantage, not sure if this applies in FK but a composite longbow will give you that STR bonus to your damage. And if I remember right, a shortbow does as well to a max of +2 damage.
I was never one to seek magical arrows, even over table top. You lose them too often. A good magical bow on the other hand, is great to have.
But with this in mind, imagine getting yourself a +4/+4 bow with +4/+4 arrows. Bow and arrows can combine magical bonuses like no other melee weapon +8/+8.



