Power Supply:Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply ($34.99 @ Newegg) Total: $34.99 (Prices include shipping, taxes, and discounts when available.) (Generated by PCPartPicker 2014-02-26 11:53 EST-0500)
This psu will be enough for your whole system. Good luck
About a 450w psu of decent quality can do the job.
It is actually the 12v. amps available that is most important, and a cheap 450w psu will not deliver enough.