Cartridge Recommendation for VPI Prime

Hello all and thanks in advance for your input.  My setup includes a VPI Prime, Soundsmith Zephyr MK111 and manley chinook updated with Phililps PCC88 tubes.    I am connected to an old Kenwood integrated KA9100 to elac debut bookshelf speakers for my office.   (i will be upgrading amp/speakers next year when i transition everything to a dedicated music room).   i feel that the soundsmith is missing something.   it tracks really well and is very quiet, but it is a bit lacking in the highs/mids.  i have adjusted the VTA on the VPI and although the quality improved, the result is just not as crisp and detailed as i prefer.   bass presents well, but not as impactful as i would like it to.   i've just double checked my alignment, VTF, etc.     the soundsmith was recommended when i purchased the VPI.  I have no experience with MC carts and suspect it might be time to explore that route.   i've recorded albums with my korg dac and sugarcube SC-2 and although the output sounds very good i would not say it's top notch...thus, i'm putting aside [for now] the speaker/amp limitations because i have tested the output on various systems.   suggestions?