I share this enthusiasm... ATH-IM02 is one of my favorite historical IEMs regardless of driver configuration (admittedly this could be some type of IEM nostalgia/rose tinted glasses effect), but out of production and I found the successor LS200 decent but disappointing. I have read that the Stagediver SD2 shares the IM02's drivers and measures similarly- hope to get around to trying that some day.
Currently have the Q-Jays v2 and the Earsonics ES2, which I enjoy but can't recommend without certain caveats- really depends on what you are looking for sound-wise. I think the JH Billie Jean is worth looking into as well but have personally only heard as a demo.
QDC Mona Lisa looks interesting... I'm always confused by their naming schemes. Do you have any particular favorites?