None of them. Also, you're aware they're all $850, right?

What 120GB SSD do you have?
What monitor(s) are you using with this system?
What sort of games will you be playing?

Actually, here;
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CPU: [ Register or Signin to view external links. ] ($178.99 @ Amazon)
CPU Cooler: [ Register or Signin to view external links. ] ($19.99 @ Amazon)
Motherboard: [ Register or Signin to view external links. ] ($70.99 @ Newegg Business)
Memory: [ Register or Signin to view external links. ] ($149.98 @ Newegg)
Storage: [ Register or Signin to view external links. ] ($43.49 @ SuperBiiz)
Video Card: [ Register or Signin to view external links. ] ($239.99 @ Newegg)
Case: [ Register or Signin to view external links. ] ($59.99 @ Amazon)
Power Supply: [ Register or Signin to view external links. ] ($49.49 @ Amazon)
Total: $812.91

Grab that RX 580 like right now while it's only $240. Otherwise, your next best bet is a Strix RX 570 for $250. These cards were like $600+ a month and a half ago lmfao, so buy the GPU now. i5-8400 is your best option since you're not overclocking and mainly plan on gaming. I'd like to have included another SSD because 120GB is pretty minimal, but I went with 16GB RAM instead. I'd add another SSD asap though, a 240-256GB SSD would be nice and not too expensive. Otherwise, get 1x8GB RAM now instead of 16GB, get another 240-256GB SSD just now and you can add the other 8GB RAM later.

All 3 systems you were looking at were roughly $850, whereas this is $810 so if you're willing to spend that extra $40, you could invest in a nicer/better case and/or PSU.

Ok thanks btw, after the discounts i think all of them are below-820.
I will get the 580 but is the 8400 better than the ryzen?
btw i think the 8500 is cheaper and better.
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thanks!

With rebates maybe, not with discounts. You'd still have to pay $850, then fill out some forms to mail away to hopefully receive a cheque at some point to get some money back, which would take the "total cost" below $820, but you still have to pay $850 up front.