I'm having this problem too. Currently, at level 42 I've got 2 Goblin Nutcracker of the Monkey (25 DPS per) equipped for the Dual Wield. Using the Shamulator, this puts me out at about 126 DPS. I'm currently 0/3 in Dual Wield Spec, so by level 45 I'll have 3/3 which will put me up to about 136 for a gain of about 10 DPS. (Those wondering why I don't have points in DWS already, I go instancing with guildies a lot and have put points into Guardian and Enhancing Totems)
The problem is, the last few levels I've been using Bonebiter (2H 38.8 DPS). Shamulator estimates it as putting out around 165 DPS.
So I'm realizing I may have jumped into Dual Wield too soon with not enough talent put into it and not the best weapons.
There aren't any good 1h alternatives on AH, and I have a friend who could craft The Shatterer (MH 31.7 DPS), which could potentially push my DPS up to 138. But I'd have to find another really nice off hand to put the DPS anywhere near Bonebiter, and I'll need those points in Dual Wield Spec before I can make the most of it in any case.
So, long story short... I guess I'm back to using Bonebiter. I like the consistency of Dual Wielding, and it seems some DPS is ultimately wasted whenever I hit a mob for overkill damage, plus it seems like my Stormstrike won't be used to its maximum effect anymore. :Sigh: ... I was so looking forward to Dual Wield.
EDIT - With Heaven's Light and Wirt's Third Leg, along with those 3 points in Dual Wield Spec, Shamulator estimates I'd have 158 DPS. Still a reduction in damage from Bonebiter, albeit an acceptable one.
Edited, Sep 15th 2007 2:34am by Elecktrofreak