John, it's tough to setup different than rega cartridge on the rega tt and rega arm but after the neccessary effort put you get much better result. In your case Dynavector 20XL or 20XH is the best mate to your TT/phono. PH3 is the best with medium output cartridges from .5mV to 1.5mV.
I was also thinking buying Rega p9 after Rega p3/Elys but i've decided to go with bottom of the line Michell(Gyro SE) instead of top of the line Rega. It's up to you which one is to choose. Rega doesn't have such deep as Michell bass and I'm happen to be the bass freak.
I was never impressed from any of the Rega cartridges and consider the top of the line Exact to be a waste. So Smiglass you chould keep VanDenHul MC10 which I know is a great cartridge that can do more with different phono.
I was also thinking buying Rega p9 after Rega p3/Elys but i've decided to go with bottom of the line Michell(Gyro SE) instead of top of the line Rega. It's up to you which one is to choose. Rega doesn't have such deep as Michell bass and I'm happen to be the bass freak.
I was never impressed from any of the Rega cartridges and consider the top of the line Exact to be a waste. So Smiglass you chould keep VanDenHul MC10 which I know is a great cartridge that can do more with different phono.