I've never heard an SR80i myself, but most people who have rate them as better. There are plenty of comparisons on the forum - try a search. I'd be pretty confident in saying they're not any worse ...
The MS1s are based on one of the lower-end Grado models (probably the SR80i given the price & cable thickness) but tuned to sound a bit more neutral. They still clearly sound like Grados though - the difference is pretty subtle, from my experience comparing them to some 325is.
I chose them over the lower-end Grados as it was cheaper to import them directly from Alessandro than buy a pair of SR60i locally!



















. You can always bend it back you make them too loose ...
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