I decided to myself that I would pick a Bow and Quiver a long time ago. While I haven't played the beta, I just love the bow firing animations for whatever reason in a lot of games... mainly WoW.
My second choice, if I decide that it's much better for whatever reason, would definitely be 2x hand crossbows.
At first I was thinking, Crossbow and Quiver all the way but then I put some thought into it and can't help but feel like a badass with 2x Crossbows rapid firing all over the place. Shoot ALL the bolts.
I voted Bow + Quiver, but Hand XBow + Shield sounds like a good choice too, depending on whether or not there's any good unique damage boosting shields out there. Something like a Tiamat's Rebuke would be glorious.