I'm late to the game (sorry), but I happenstance came across this discussion and thought I would add my two-cents.
My experience with the MY Sonic Lab cartridges is limited to the Ultra Eminent EX.
It is so good that I have considered trading my new, in the unopened box Kuzma CAR 50 for another go-round with the Ultra Eminent EX.
Although I have not heard the Hyper Eminent, my hunch is the extra $1500 for the Ultra Eminent EX would be money well spent.
To be fair, the Kuzma CAR 50 is a superb cartridge and I have not compared it side-by-side with the Ultra Eminent EX.
I did, however, compare the Ultra Eminent EX against an upgraded Ampex ATR-102 playing the same music: one on tape (master copy), the other on vinyl.
The tape sounded better (of course), but the Ultra Eminent EX thoroughly impressed me.
I own the same table as you (my second one), but with the 4point 11" arm.
The Stabi Reference original and 2 (with the upgraded power supply) continue to keep my attention longer than anything else I have heard. . .