I prefer coinbase, I have my reward sent straight to them, and every now and then (depending on gox's price) sell straight to my bank account.  They do a 1% fee, and there's like a $0.15 "bank fee".  Way cheaper than gox if you are cashing in in the single digit BTC or less.  Now, gox's $10 wire transfer fee is looking okay around the >$1000 worth, but...not for this small fry