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?  
mjb87062017
What are you using to measure alignment: Overhang, VTA/SRA, VTF, azimuth? What are you using to measure tracking ability?
Hi.  the VPI provided accessories (alignment jig and force guage).  VTA by ear since its adjustable.  thanks 
Suggestion: Do the amp and speaker upgrade first and then come back to the cartridge. You don't really know what you are getting from the Soundsmith with the electronics and speakers you are using. Once you have settled on speakers you like and compatible amplification, you can start playing around with different cartridges to see what might be better than the Zephyr.
There is a lot of discussion about this subject on the VPI Forum, too which a Google search will lead you.