theres a great video from dan worall; where he goes toe to toe with Pro-Q vs ReaEQ. TLDR; Pro-Q wins, but only slightly.
However I dont think you can go much better than your daws native lin phase eq. no sense in buying anything else, imo. Fabfilter is the king, if you really want the best, but its really only workflow improvements, and slightly better filters (can go up to 96db and even brickwall should you so desire) but theres no difference in sound quality.