I made a list on PCPartPicker and it looks like MemEx has fair prices for all of the parts so that's a good start.
https://ca.pcpartpicker.com/list/XcGQsk
How much are they charging to assemble it and load Windows? I know they'll install the CPU and RAM and test them for free. Are you comfortable doing the rest? It's pretty straight forward.
Do you have any other storage? If the m.2 is just for the OS and productivity apps then 500GB is fine but if you want to put games on it so they load fast you'll probably want to upgrade to at least 1TB. The latest COD is over 100GB itself!
I would also suggest bumping up to at least an 80+ Gold power supply. Stay with Corsair though. They're solid.
You might consider this motherboard for futureproofing but it's quite a bit more so it might blow your budget.
https://ca.pcpartpicker.com/product/...gaming-edge-ac
Even if you don't do these upgrades it looks like a good build to me. Have fun!