Darkbreeze I was talking your good hands.
If I was on uk pricing? On newegg
Looks like you could do a asus prime x470 Pro (which update needed by you with a 1st or 2gen cpu If you buy too soon)
https://www.newegg.com/p/N82E16813119100
I saw 3 x570's for $169.99 and a asrock phontom for $154.00 but i don't think it's in stock yet. And i have no real reviews or threads to go on yet as to recommend an x570.
And G.skill 16gb 3200 2x8 gtzrx
https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820232751?item=N82E16820232751
if you could raise your budget for the mobo you could get into a entry level x570.
Or depending on what you are doing with the system you could go with the 3600x use the difference for x570
Or wait awhile till current x470 mobo stock gets changed out with updated boards, but there is no telling how long for that, (saving your money while waiting)
But know on the x470 you won't get all the new features like pcie 4.0
Would you be buying online or @a local store which maybe could update the mobo?
A few things to think about.
Good luck with you build!!!!