Hi, for a file storage pc I'm making, I need a power supply that can do at least 200 watts 24/7 with the lowest price on my electric bill (high efficiency). I'm looking at continuous atx psus such as: http://www.amazon.com/dp/B00H33SFJU/?tag=xov-20 and high rated normal psus such as: http://www.amazon.com/dp/B008XEYT5M/?tag=pcpapi-20 What would be better for running 24/7, and what would be better on electric bill? If you have any suggestions, please let me know, thanks.