Sub £200 ryzen 1600 or i5 8400.
Over £200 the i5 8600k & an aftermarket cooler (because it doesnt come with one).
With a 3gb 1060 & a 60htz monitor you're not really going to see a massive difference between them.
Pointless going out of your way to spend the full £280 when it will gain you essentially nothing imo.
Saving is better spent elsewhere in your system, would get you an ssd or 16gb rather than 8gb ram if you hadnt already budgeted for those