New to PC computing, need help picking a PSU

Hi everyone, I just got a new PC for Christmas. I have had Macs in my house since I can remember and this is my first PC. I need a new power supply to go with the video card I plan on buying. First off, I am not sure how much power my video card requires. Here is the card I am going to buy:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Here is the exact computer I received for Christmas

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I was thinking about one of these three power supplies, but am open for more suggestions. I would like to spend around 50 dollars if possible, if not I can spend a little more.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I would like to go with the Corsair but I don't know if 400 watts would be enough.

Thanks for any input, it is appreciated.