I know that a power supply should not be skimped on BUT people still do it and get away with, while some do it and their house burns down. Either way my idea was that according to the power usage calculator I use, Im going to need about 290 maximum. So my idea was to buy a 500-600 watt PSU of cheapo 19.99 variety and being that Im only drawing a small amount of what its rated for, I should be OK? Any flaws in my logic?