WARNING: Upon reaching level 4 Vamprism, every NPC (Except the ones in your guild) will attack you and you will be very weak to fire. If you want a somewhat cooler backstory, you could get Vamprism, using your powers to kill the rest of the vampires and eventually the one that gave you it, thus being cured of it. You need the proper ranged weapon, a crossbow.) With the new release of Dawnguard on June 27th, all your archery based bonuses will apply to your crossbow (as a vampire hunter, you have no need for silly bows. I would say One-Handed, Light Armor, Archery and Restoration. Or you could try having your family and lover being killed by vampires, and you desire revenge. I really don't care what it is, but I recommend something to do with your family being vampire hunters and you decided to follow in their footsteps. Ever consider being a Vampire Hunter? You know, those badass guys who kill Vampires in mid evil times with musket pistols and rapiers? Well you can try it in skyrim (With a few exceptions.)

Skyrim van helsing armor