pffft, bigger psu? lol
im powering a much more power hungry system on a 420 watt psu. if you go too big, your idle power draw is low, and you get terrible power efficiency below 50% max power on a psu. idle a computer such as the one lealla priced out will use around 150-200 watts.
its all current on the 12v rail. if your psu has 30amps on the 12v rail (360w btw) that is enough for ANY single gpu system you can build.
on that psu it has 2 17amp 12v rails, with a max 12v power of 360w.... hmmmm thats a continuous ability to spit out 30amps of 12v goodness.... mmmmm
good psu choice lealla, a nice power friendly one too. save you many dollars on your power bill
/step on soap box
people use bigger psu's than they need cuz they listen to people that needlessly buy 700w psus cuz they don't know if its enough. if it is a brand name psu, including: silverstone, pc power and cooling, seasonic, corsair, thermaltake, antec, tagan, coolermaster (i think there are a couple more). your going to get your power.
3 things to look for on a power supply, in this order, what is the continuous power on the 12v rail? what is its power efficiency? what is its continuous max power?
/step off soapbox
and yes, Western digital Hard drives are the best. the coolest, quietest, and fastest you can get
or segate, 5 year warranty ftw. (only the hdd, not whats on it)