semi-OT:
would you maybe consider the Abyssus?
i had the Ab and now have DA, they have the same sensor, the Ab is lighter and has a better shape, tho a wee bit small. The DA is heavier and for the shape it has you won't be able to palm it, so, claw grip it is and in the long run it hurts.
Ab is also cheaper. great mouse, tho it does tend to break - but that's what warranties are for.