I have the JVC Kenwood HA-FX850. I am so happy every time I listen to them that I really can't imagine any IEMs that would sound better. This probably demonstrates my ignorance and lack of exposure to audiophile-level IEMs. Anyway, I am wondering whether anyone has an opinion on whether it would be an actual upgrade to buy the next model up, the JVC Kenwood HA-FX1100. If my thread is something that would bring the general quality of the IEMs discussed in this forum down, then I apologize and ask that the moderator just delete this thread.