yeah dude, a standard ATX power supply will be fine because of the standard voltages.
The amount of power (350w) should (not definate) be enough to power the cpu, Mb + ram, some drives, mid level vid card and a few pci cards and some fans. If you are going to have more stuff in your pc, you may want to get a more powerful one.
<font color=red> -- </font color=red><font color=blue>A bush in the hand is worth two birds at the bar</font color=blue>