also i forgot to ask how many bitcoins would i get a week with this as an estimate?

how many watts an hour would this particular miner use an hour?

Hello,

I'm looking to start bitcoin mining and i have some questions:
1. is this a good bitcoin miner for someone just starting out http://www.amazon.com/Bitmain-AntMiner-S3-453Gh-Digital/dp/B00LETT8VS/ref=sr_1_5?s=pc&ie=UTF8&qid=1453966328&sr=1-5&keywords=Bitcoin+miner
2. and going on from the first question would i need  psu for the miner?