Unless I'm missing something about those damage meters (neat btw, how does a guild use those?) you should be able to throw down more dps than that. Maybe not 200 more, but more.
Your spec is good, your gear is good, so its a play issue (not to say you're a bad player).
What buffs do you get?
What is your attack rotation?
You use poisons?
With my gear, which is a lot worse than yours, I have regularly hit 600dps, sometimes even 700.
Edited, Nov 4th 2007 10:58am by ArundelvalEstar