Bit of a late reply - thanks for the responses!
Going to upgrade the system in the next few weeks to a Ryzen by the looks of it. Probably along the lines of a Ryzen 2600, some 3200Mhz DDDR4 16GB Corsair ram and a B450 board to throw it all into (probably the Asus Prime as the bios looks lovely). As soon as I finalise the parts I should be good to go.
Good thing is, I can sell my i3570k, my Dominator Platinum ram and my motherboard for a decent whack. I've worked it out and, if my parts sell fine (which they always do due to keeping boxes), I can upgrade for £150.
Woo!