i want to build a pc and whats left to chose is the psu but i dont know how many watts i should get or the brand.the build is using 274 watts and here is the pc parts witout the psu http://pcpartpicker.com/p/Ddxg23 i wanted to go with the corsair cx 500w semi modular psu but i heard that they arent the best for gaming. so i came here for advice.