BTC-E fees are .2%. What exchange has lower fees than that? It's actually my favorite exchange for BTC as well as altcoins. After being screwed multiple times by Bitstamp's trade engine, BTC-E seems excellent to me.
I believe .2% is the lowest of all, cryptsy have .2% also. Unless you want mcxNOW which is .25% but a chance to win the lotto...