I was looking for an upgrade for my off hand when I found a really low DPS dagger with amazing stats. The stupid AH won't let you compare gear to what you have equipped so I used a DPS calculator and found that the low DPS dagger would actually increase my overall DPS. And since I'm using the Double Tornado build, my tornadoes are now doing a ton more damage.
Pic of stats + weapons (Slice Ember was my old off-hand):
the dps calculator I used in case anyone needs it and my build