But it is also depends on records you're listening to, you don't need audiophile pressing (re-issues), just a proper original pressing. Some records are better than others, but re-issues most likely inferior to the originals. I hope you have some great recordings to start with.
For extended frequency response you need a cartridge with the best possible stylus profile (not conical, not the elliptical), something like MicroRidge, MicroLine, VdH, Gyger or at least Shibata, LineContact.
P.S. You can always try a decent MM ot MI cartridge and maybe it will be better.