Example: Enlight offered only a 350 watt Prescott rated power supply with their OEM cases up until recently. Now Enlight offers a 450 watt power supply. I ordered one of those cases with the 450. I will keep one on hand to offer as an option. My reasoning is if the 350 watt has done well with the Intel 3.2 GHz CPU up until now. To force feed a 450 watt power supply case to my new customers would be like saying all those 350 watt builds are inadequate.
Given that next-generation video cards could pull upwards of 200 watts, and current/next-gen processors pull 100 watts or more, it seems to me that all you are doing is forcing them to have to replace the power supply (in addition to whatever component) if they want more performance down the line.
I don't skimp on power supplies in any machine I build. I try to make sure there is adequate juice for at least the next generation of components. I won't even consider anything below a 430 watt supply for all but the most severe budget builds (and even then, only something like a 400W Sparkle or an Antec True380).
Greg
