Hello I've got a unbranded 500watt PSU running my 2nd comp atm and thought its best I put a better one in. what would you guys reccomend its running a amd x2 545. I think. 8gb of ram and 5 harddrives but will be 10 as soon as the price drops. This thing is used just for storage. And will be left on all day but shutdown at night. I was thinking along the lines of a 650watt would be ok? Thanks for the help.