Wireless shouldn't be too bad in most cases, if you are comfortable enough with your mouse, then keep using it, it is probably good enough, why waste money upgrading your mouse?
Some possible improvements could instead be made by reducing your DPI if you are using a crazy high sensitivity, and turning off mouse acceleration if it isn't already.
Some possible improvements could instead be made by reducing your DPI if you are using a crazy high sensitivity, and turning off mouse acceleration if it isn't already.