Can't remember exact stats, but at your lvl i used a two-handed long sword. Bought it from Weaponsmith in Scale Yard for 11/12sp. nice dmg, not to fast tho.
At 15 i started using an iron maul for increased dmg.
At 20 i started using the blade we get at 20.
At 22 i started using skullcrusher wich i got from a quest in FG. (Real nice weapon, tho i think SK's should use a sword.)
I'm outgrowing the skullcrusher now, so i must find something new for me own. not sure what that's gonna be.
Heard somethin bout a Skullsprainer. Dunno where to get that yet...
Aroc, 25 Barbarian SK on Najena