What is the "best" cartridge a Technics 1210...

I had used the Nagaoka MP-110 cartridge on my MkII and liked it very much but, itching to try something else, I bought a Zupreme headshell and added the Dynavector 10X5 which was even better. The Dynavector is a high output MC so is suitable using the phone stage's MM output. I tried it on MC but the MM had a lower noise floor.

My 'table has the KAB damping trough plus I'm using the TTweights copper mat as well as their 1 lb. record weight. The copper mat is placed on top of a stock 1/8" rubber mat which both damps the platter and provides VTA adjustment with "thinner" bodied cartridges.

Stanton 680 EL
Ortophon Nightclub E

I wonder if anyone has tried even higher-end MC carts with the Technics -- stuff in the >$1K range from Benz, Koetsu, Lyra, ZYX, Sumiko, etc. I know it =seems= like a mismatch from a price standpoint, but is it really?

I know a guy that runs his M5G with a Dyna XV-1s and thinks its an outstanding table, he also has a top flight phono stage.

I was considering Denon DL-301 MK2 after reading a lot of good reviews. My question is, what about the headshell. I would like to update the stock headshell, buton technics tonearm it has 12g effective tonearm mass. And all the good headshells I see are 12g, so a little math:
(12-7.5+12) = 16.5g - effective tonearm mass with the new headshell.
where:
-7.5 stock technics headshell
12 - new headshell

And this will move the resonanse to a point, where it's not good, right?

Do you guys have any suggestion for a good headshell, that will sound better than the stock one?