What cartridge on your VPI prime?


I own a VPI prime, I installed a denon 103 R and I had never change the cart due to lack of funds. Now I want to upgrade my analog ring to the same level of my digital.
I have been considering based on reviews.

1- ortofon quintet
2- charisma MC2
3-ortofon black
4-kiseki blue.
5- rega alpheta 2.

I would appreciate any inputs from your end about cartridge selection and phono associated currently I am using graham slee reflex M.
Kind regards and thank you.
mountainsong
I am very interested if anyone has heard the Charisma MC-2 particularly on a Prime. I am debating between this and a Lyra Delos. 
Can say i'm using an Ortofon MM Bronze currently which is very nice but recently upgraded to a Manley Chinook and am wanting to try out a MC cartridge so heard lots of good reviews for the Delos and Prime but the Charisma is intriguing.
Jmcgrogan....I just installed a Cadenza Bronze on my Prime today. I had a 2M Bronze on it and thought I could just use the same mounting screws....but no. Just like you they didn't work. All the screws by themselves were to short or to long. But I saw in the hardware bag a small spacer (larger than the washer) and used that...it worked just fine. Look in your bag and see if those are there. They screw on. Good luck.