Vers is a flat 10.5% increase in damage while haste enchants will give you 15.4% more haste. This will in turn reduce the CDs of your attacks and you will get crus procs more often. Since as a fury warr you rely on getting the 20% proc chance from bloodthirst, the less CD it has the better. For specs that benefit from haste, (ench shaman and fury warr), haste > vers. I don't have the mathematics behind it, but from personal experience of a 29 and 20 warr I would definately use haste for fury and vers for arms.
Draconic Leg Reinforcements can not be bought, you must get 400 LW (but stay under 500). You can put the enchant on heirloom legs and it gives 6 str 4 crit in BG making it BiS.
EDIT:
Band of Foul Strength - Item - World of Warcraft is 10 strength, you may want to get that too. I would enchant your current 2 rings with haste and use Band of Foul Strength + another Silverlane's Family Seal with vers enchant for arms. Forget loom ring, its really not worth all the strength loss for only 4 haste.