Shelter 501Mk2 or ZYX R100-02H

Yes, the ZYX has a long life. Good for at least 2000 hours and even more.

OK, this is useful information...
As I said, I have EAR-834P DeLuxe.
And pair of tube amps - Audio Research LS/VT.

What's the actual compliance of the ZYX R100? More like 22-30cu?

Sirlordcomic,

I don't know where you got that information but it doesn't match ZYX's specs or my experience.

I've used over a dozen ZYX models in the last ten years (Bloom, R100, Airy 2, Airy 3, 4D, UNIverse, Omega, UNIverse2... in all three coil materials... in both high and low output versions).

They all measured/behaved like 12-15cu cartridges, as specified.