looking for a power supply for a gtx 970

Logo09

Honorable
Jul 15, 2014
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Hey guys im looking for a power supply for when I upgrade to a geforce gtx 970, I think my current power supply is a 350 watt so I know that won't do for a 970. Im looking for atleast bronze efficiency and I want atleast a 3 year warrenty for the power supply. Also I would like it to be modular. Im guessing I just need a 500 watt for the graphics card. anyhelp would be much appreciated as I don't understand the way power supplies work very well
Here is my current pc: http://www.bestbuy.com/site/asus-essentio-desktop-12gb-memory-2tb-hard-drive/5818001.p?id=1219159703994&skuId=5818001