I have yet to hear SE846 (can't demo it in here Belgium) but I spoke with some users that I trust in head-fi, they mentioned the resolution is pretty bad if you think about their price. However they all agree the bass is legendary and midrange is quite good too. Don't get me wrong, I trust you too, you were one of the ones that I counted their opinion before getting SE5way and I regret nothing, best purchase of my life. I just have a feeling like Shure will improve the model soon with better treble extension and increase the price by around 200 or something.
To be honest it could work for me actually but if I ever go back to universals, it will be either FitEar (cuz I can't get their customs from here) or Tralucent Audio.