In a very general sense you are already 'on par' with a card like the 6700XT. A 3070 is a little bit faster. IMO, if you were going to spend the money to want a significant change that you could actually seat of the pants feel, I would suggest something in the 40xx series.
Of course, at 1080/60 that would be a complete waste of money. You would want to consider a different monitor/higher resolution and framerate to take advantage of that manner of graphics power.