It depends on your Case, that is a MicroATX board so any decent supply will work but your limited by what the case can hold. Is this a Small Form Factor, Mini Tower, Full Tower or Desktop style case? Another factor here is price, how much are you willing to spend?
For a case that uses a normal ATX these two are good budget supplies that will last longer than the System itself.Power Supply: SeaSonic S12II 430W 80+ Bronze Certified ATX Power Supply
($44.99 @ Newegg) Power Supply: XFX TS 550W 80+ Bronze Certified ATX Power Supply
($62.99 @ SuperBiiz) Total: