I am also at the moment using http://www.wowhead.com/item=17069 as ranged, but hoping for a nice drop on http://www.wowhead.com/item=30906 or http://www.wowhead.com/item=32336 .
For my polarm I am using: http://www.wowhead.com/item=50296 . I farmed this every day with a warrior who is going for a DK lookalike or a Pally lookalike. They look a little like:

Kneeling (gotta love the raptor photobomb


Standing, holding polarm

Shooting bow. Bow is bound to change once I can find a BT/Hyjal/Sunwell group
...well that's my set so far ^.^
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V2:
Well, I finally got to do some old raids, and got the full Riftstalker set. I honestly thought that I would never get it. I also got [Black Bow of the Betrayer] After asking Illy NICELY to drop it.


Standing. Holding neither weapon.

Holding Polarm

Holding Bow.
Well, that's what I got ^.^