That 9590 is just an oc'ed 8350 so its not nearly as good as an i5 + the i5 draws way less power.
PCPartPicker part list / Price breakdown by merchant
CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($272.00 @ CPL Online)
Motherboard: MSI Z97-Gaming 3 ATX LGA1150 Motherboard ($185.00 @...