I have a Dynavector 10x5. Its a hold over from my Scout. It sounds amazing on the prime. In fact it sounded like a entirely different cart.
I did have a friends 20x2 on the Prime. It sounds a little more detailed and refined. The same or bigger sound stage on everything. The bass is not as punchy. I have to admit I like the 10x5 better. More musical and fun. A lot of people would disagree with me but that is how I feel. Six moons agreed with me on a cart shoot out.
https://www.avforums.com/review/vpi-prime-turntable-review.11784
This review suggest the Audio Technica AT33PTG/II is amazing cart on the prime. There has also been much talk of ART9 which cost 1000 bucks on audiogon. If the cheaper AT is a good match I am very curious to put the ART9 on the Prime.
VPI has cart suggestions on their website. They like MC ortofon cadenza series. They also have other brands listed on their website under the prime. You can also look at their user forum. Its filled with threads talking about what carts are being used on VPI tables.
Hope this helps. Don’t think you will go wrong with AT or Dynavector. Have fun