Good point.
I'll look into the power draw, and see about that. I like to have a LOT of margin in power supply.
The good news is that a lot of components use less juice for more punch nowadays. The processors draw about 65 watts each when they're screaming, and so does the graphics card. Hard drives run about 9 watts each when they're reading and writing. Not sure what the motherboard pulls--there's some big cooling fins on some of those chips.