I agree with Larry's post. If you're gonna be a barbarian gotta use the rage. I myself experiment a lot with weapons guys (rogues, rangers, paladins, barbarians, fighters), and I've found a couple of builds. A barbarian (16)/fighter(4) is basically equal to the fighter in that he can specialize in a weapon, dualwielding and wear heavy armor, plus he can rage.
I also like the concept of a barbarian/rogue. I had notes lying around somewhere, but I love this (rage + a half decent sneak attack = giblets of opponents)