Originally Posted by
Greyloins
Assassins can only dualweild daggers, while rangers hardly use melee attacks, so you're probably looking for barbarian or conqueror.
Of the two, barbarians have some really awesome-looking combo animations, but overall they're near the bottom of the totem pole both for endgame PvE DPS and in PvP.
Conquerors don't get to be DPS very often since there's usually a higher need for tanks(and Carnage, the dual-weild spec, is a DPS spec), but they've long been regarded as OP in PvP and are very useful in PvE as well as tanks with moderate DPS and providers of an in-combat resurrection ability. They're getting a solid whack with the nerfbat soon though.
My advice; don't let cool concept art dictate which class you pick. Lots of what you see in artwork (example: the Khitan assassins in green masks dualweilding scythes on the launcher) didn't make it into the game (unless you consider that early concept art for the Brittle Blade or something).