For $60, I'd rather use a Rosewill Capstone 450W (Super Flower Golden Green) than an EVGA 600B (HEC/Compucase) to power that rig.
The peak power dissipation of an overclocked i5 and overclocked GTX970 and a smattering of the usual system components would be right about 450W. Quite honestly, I would trust the Capstone to run at it's label rating longer than I would trust the 600B to run at 75% of it's label rating. Not all wattage ratings are held to the same standard.
If you can find a Capstone, or Seasonic (or seasonic made XFX) 550W PSU for a few bucks more do that instead.