Being just a little obsessed with moving iron pickups, I have acquired a Soundsmith Sussurro MkII along the way. It's a couple of steps higher up their food chain than the Zephyr, but even so it has been a disappointment. It seems bland and unexciting, a complaint I can also level against the Grado Statement 3. Playing with resistive loading (using an MC input) helps, but doesn't save the situation. Frankly, the Nagaoka MP-500 walks all over the pair of them.
I'm in the process of adding two extra tonearms to my two turntables. So far, the London Reference, Ortofon Kontrapunkt C, and Nagaoka MP-500 have earned their seats. Rather than use the Sussurro or Statement, I'm thinking the last spot should go to a mono cartridge (or, Gawd 'elp me, one of those two with Y-connectors to make a bridged mono cart!)