It depends on your stats, most warriors reccomend going fury when you have the soft cap for crit (20%). Ofc you need to get hit/exper cap.
Since Fury is very dependant on crits for procs and stable dps. Most fury warriors with less then 20% crit find themselves just waiting for BT to get off cd. Thus not being able to do decent sustainable dps.
And if just search for arms/fury, you will find 100 posts asking the same question you are now.