Need help on cartridge recommendation, under 500.

I've been a long time fan & user of the excellent Audio-Technica AT-ML170 moving mag. cartridge, but...what else, am searching for perhaps more detail & smoother mids?

I'm currently using a Well Tempered "Classic" (latest version) with the outstanding B.A.K. P5 all tube phono stage.

Any & all recommendations for moving coil/magnet under $500. would be greatly appreciated.

Thanks!