Actually, with a bit of burn in and some better tips, the AI-M9 sound just as good as the M6. And yes, I took off the memory wire from the M6. It's just a cheap metal rod that is contoured around wire. A little snipping from some small scissors will take them of real easy. Unfortunately, now the wire hangs loose, but at least it's more comfortable for me. Phonak silicone guides anyone?
By the way, if I were to look for a high end IEM that has a similar sound signature to the M9's, what would it be? And please don't say the PFE or RE0, because those are cold and slightly bass-shy, the M9/M6's are not.