Monk weapon choice, mid- to high-levels

[gcobb]

So I'm a 33 monk using a good old Wu's Quivering Staff. I think it's about time for an upgrade, and am considering both the equally good-old Jade Mace/Knuckle Duster combo and Peacebringer. Now, the conventional received wisdom seems to be that our 2hb options are always better than our 1hbs from 20-epic. I'm just curious, does anyone have or know of hard statistical data to substantiate this? I've had a hard time finding #s on our dual wield rates by level, which the dual wield rate is probably the most important variable in this whole equation.

Thanks in advance for any help.