I feel you buddy. Right now I'm specced annihilation for PvP. It's really fun/useful for movement, control, bleeds to break camoed targets, and self healing. A lot of my friends are speccing carnage for the burst, CC and anti-cc.
Your choice really. Rage seems to be about sustained damage but I'm not sure, never played it.
I may be wrong, feel free to correct me. I hope this helped.