http://forums.d2jsp.org/topic.php?t=57524636&f=74dmg wise they are pretty much the same.. the important thing is which classes can use which weapons.
there are mainly 2 options:
axe + dagger (most expensive but imo the best option)
sword + staff (later + axe) (2nd best option imo.. pro: you can use swords for the first 3 classes. con: you only need dex gear for dagger + axes but you need str gear for swords + dex gear for staves.