I'd go with the Black Widow, but I have no experience with the Rabco so take my vote with a grain of salt :scratch2:.
I've used a number of cartridges successfully with my BW, including a Grado Reference Platinum, Adcom HC-VdH II, Clearaudio Arum Beta mk II, and most recently an ADC ZLM.
I've used a number of cartridges successfully with my BW, including a Grado Reference Platinum, Adcom HC-VdH II, Clearaudio Arum Beta mk II, and most recently an ADC ZLM.