Back-to-school PC build ideas?

Hey there, fellow tech enthusiasts! I’m looking to help someone out with a PC build for school. He’ll mainly be running CREO 3, but he also wants to squeeze in some gaming sessions of CS:GO, League of Legends, and maybe even a bit of Call of Duty: Black Ops 3 every now and then. He’s already put together this list:
an Intel Core i5-7500 (Tray version)
a Gigabyte card with 4GB GDDR5 and an RX 580
8 GB of DDR4 RAM
a 1TB Hard Drive
plus a Sharkoon VG-4 Red ATX case for about $595. He still needs to pick up a motherboard and an SSD, which should run him another $110 or so. So, thinking we're at a total of roughly $705—is this setup pretty solid, or could we actually grab something significantly better if we bumped the budget up to $700? Thanks!

PS: Just as a heads-up, I'm using Amazon.com for price comparisons here.

The power supply is missing too, but that’s fine. I guess you could just throw in a B250 motherboard and maybe a 250GB SSD. If it’s even possible, though, it might be worth trying to squeeze an RX 580 in there.

So, I'm looking at an RX 580 and wondering what kind of power supply I should be aiming for—how many Watts do you think is the sweet spot? Thanks!

edit: Also, would you say this XFX RX 580 8 GB RS XXX card is a solid pick?

Does this look alright to you guys?

Power Supply:

https://www.amazon.com/Corsair-CP-902...913878&sr=1-49

Hard Drive:

https://www.amazon.com/Blue-WD10EZEX-...8913940&sr=1-6

SSD:

https://www.amazon.com/SANDISK-X400-2...8914005&sr=1-7