I recommend human Barbarian 6. More fun (and you can act superior to all the multi-class mutts at the table). At higher levels, lots of abilities are based on what your barbarian class level is.
feats:
1: Exotic Weapon Proficiency: Spiked Chain
1: Power Attack
3: Cleave
6: Great Cleave or Combat Reflexes
9: Combat Reflexes or Great Cleave
12: Improved Bull Rush
15: Shock Warrior (Complete Warrior)
18: Weapon Focus or ?
Personally, I think human barbarian, dwarf barbarian, and half orc barbarian all work well.