Level 3 Feat for Warforged Melee (3.5)

[Chester]

Hello!

My Warforged Spirit Lion Totem Barbarian 1 / Dungeoncrasher 2 just leveled up (that's the second level of Dungeoncrasher). I have a level 3 feat to burn, since I don't yet qualify for Leap Attack or Shock Trooper. So far, I took:

Adamantine Body (level 1)
Power Attack (flaw: Quick Burning Rage)
Cleave (flaw: Implacable)
Improved Bull Rush (fighter 1 bonus feat)

I'm using the Whirling Frenzy Rage variant, which has been nice thus far-so I'm thinking Extra Rage for the next feat.

There's also Improved Initiative, which is helpful all around.

Or Weapon Focus, perhaps?

What are your suggestions for my free feat? I'm heading for Warforged Juggernaut, FYI.

[Uncle Pine]

Extra Rage and Improved Initiative are good staples, but depending on how long it could take you to find/buy a +1 mouthpick weapon with a handle that can be wielded with two extra hands Jaws of Death could be used to further improve your damage output. In the meantime, you get an extra bite attack.
Mouthpick is from Lords of Madness, while the rules on how to build weapons suited to be wielded with more than two hands are in Savage Species.