Warrior weapon damage vs proc?

[Captain Faceplant]

Obviously the answer would be "both" if I could afford it, but I can't.

I'm talking about weapons like gnoll hide lariat, which is 3/20 (utter crap) but procs stun (possibly the best aggro proc you could have at level 25). Is it worth the crap ratio for the proc? Or in that case would it be best to go for weapon damage?

The war in question would be low to mid-level; I doubt I'll ever make it to the 50's with this char, melees just get too boring. Looking for suggestions on aggro weapons until then.