I plan on overclocking the 1080 and r5 as best as i can and i’m not sure what kind of psu to get. Would 600 watts do or like 550 maybe i have no clue so any suggestions?
If you are willing to do mail-in rebates, Newegg currently has this nice 750 watt Seasonic Focus Plus Gold for the same price after $25 rebate. It's a well-received power supply with a 10-year warranty...
Also, do you own the GTX 1080 already, or are you getting it for a much better price than what's shown on PCPartpicker? If not, you should probably go with one of Nvidia's newer 20-series RTX cards instead. Supplies of 10-series cards are dwindling, so the prices are rising, and it doesn't make much sense to pay nearly as much for a GTX 1080 as what an RTX 2080 costs.