Are those your only options? There are probably some more budget-friendly ones that will do the job.
Unfortunately all the 850w gold corsair and evga are around $190-$200 ($160 usd) here.
What are some other reliable psu manufacturers? Maybe I can find something cheaper.
This isn't an exhaustive list, but for consumer PSUs, here are a handful of OEMs...
Good:
Super Flower, Seasonic, FSP, Delta
Decent:
HEC, CWT, Sirfa/Sirtec, Andyson
Do note that companies such as Corsair and EVGA will vary in their choice of OEM for different lines, so look carefully.