Grado, Soundsmith, Nagaoka and London Decca are all MI. Of those, if londondecca.com don't start making cartridges again, I'd go for the Nagaoka MP-500. I haven't had anything higher than a Grado Statement 3, or a Soundsmith Sussurro MkII, but to my ears the MP-500 knocks their socks off. If the Deccas are made again, that is a step better, but a lot more expensive.
