Lets just say that the most damaging weapons in the came come from the polearms category
. As has been stated above, in Kuldahar, you can get one very nice weapon and one truly awesome one! Note, if you are playing with a good character, then you're missing out big time here!
The most devastating fighter I created was a polearm wielder.........32 STR, weapon specialisation, +5 power attack, a Massive Halberd of Hate +4 and x3 criticals = yeeeha!