Well, your DPS is low, but imho thats not a weapon thing.
I got a 741 DPS weapon and still end up with 35k DMG since i stack familiar with magic weapon and host a lot of attackspeed.
I use diamand armor, spectral blades, familiar, magic weapon, enegry armor and poison hydra.
No too much problems in act 1 inferno so far unless elites got speed. having around 25k life 35k DPS and resitances of around 200 each.
But yeah i got to mention that this playstyle affords attention, and once you loose it you might end up dead in parts of a second.