I assume you mean the VS PSU. Corsair makes some really good PSUs, but the VS line is the bottom of their product stack and is not a great PSU. If you want corsair, I would start with the CX line for a budget PSU.
550 watts is probably enough for your rig if you get a decent PSU, but this seasonic is a good price for a 620 watt.
PCPartPicker part list:
https://pcpartpicker.com/list/XdxFf7
Price breakdown by merchant: https://pcpartpicker.com/list/XdxFf7/by_merchant/
Power Supply: SeaSonic - S12II 620W 80+ Bronze Certified ATX Power Supply ($48.99 @ SuperBiiz)
Total: $48.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-04-26 17:31 EDT-0400