The problem with a poor quality power supply is when they die, they rarely die alone. When(not if) it blows it can take every component its attached to with it. I have seen this happen on more than one occasion. Every time you run the computer your throwing the dice. When you build a rig never skimp on the power supply is one of the most(if not thee most) important components.
thats right...i had a thermaltake tr2 and it crashed and burned when i did a hdd swap.