Any changers, like circle, coinbase etc, they will cost your over 1% fee, so you can choose a Bitcoin Exchange, here
https://bitcointalk.org/index.php?topic=695082.0e.g..
BTC-e: 1.7% cost (
min fee $150 )
Put your bitcoin into USD 0.2% -> transfer your USD into your bank account 1.5% (
min fee $150 )
LakeBTC: 0.4% + $5 costBitcoin to USD 0.2% (
Taker ) -> USD to your bank 0.2% + $5
Bitstamp: 0.59% costBTC to USD 0.5% -> USD to bank 0.09%
and more exchanges you can calculated the cost in this way.