I agree with all of the above. That said, a vintage XLM MKII Improved ADC cartridge is a good match provided you can find one that doesn't ride too low.
Cartridge Suggestions for a Black Widow Tonearm
I have a TT with a BW tonearm (low compliance) and want to get a good cartridge for it, preferably a MC. However based on what I have seen I should look to get a cartridge that is high compliance, something that is > 20UM/MN or 20-25 - 10-6power. The only ones that I see that are close are some of the Grado's and Ortofon 2m's neither of which are MC. If I can go down to a mid compliance cartridge some additional choices open up but not sure if they will work to their optimum... suggestions