You are limited by the tt arms you have since I’m guessing the vpi has the jmw9 tonearm. If you go with an upgraded cartridge up to $5k, you need to upgrade the tonearm, maybe using the vpi tt with a new vpi 3D arm, 10” or 12” if they would fit. I would also disagree with you on the comment that your tt’s sound the same or not the weak link.
Looking for the best moving coil cart that is around $5K used
I currently have a Dynavector drt xvs1 and am looking to upgrade. In my experience, the TT has little to do with the sound. I have a $400 Pioneer PL 71, and It gives me just as good of sound a my VPI-Scoutmaster . I’m looking for a used moving coil cart around $5K. I like clear sound, not too bright, but very articulate and good tight bottom end. Please give your suggestions and why. BTW my phono preamp is a Rhea Signature with new low noise tubes. Sounds great, just looking for the elusive unicorn