first a short summary of the iems i already own(ed):
EP630, Koss The Plug :-), ue300, UE Super.fi 5 EB, IE8, UM2; TF10
from these i like my tf10 best. But usually i am listening to my shure srh-840 at home. I like the warmth and the great 3d-alike soundstage the Shures produce.
i thought the ie8 would fit my needs, but i was dissapointed in case of basscontour, each bassline sounds the same with these. also the mids were covered by the bass even with the lightest bassadjustment. they have absolutely no controll.
Most of the time i listen to electronic music, so i really enjoy if the sound comes from far away corners reaching my ears. i hate it, when everything comes straight in youre face (like for example the m50s i owned did).
So soundstage has to be quite wide and out of the head for me. The tf10 do a nice job, and sometimes they sound a little bit 3d-alike. but i wonder if there is an iem, that does a better job in this term.
overall i like deep bass and recessed hight. the tf10 sound a little too cold and the highs are a little too pronounced.
Hope my description of what i am searching for gives you enough hints to help you giving me advice.
Which one should i choose if i would spend up to 400 $?
edit: my english seems a little rusted over the years (i am from germany) would be nice, if you could check my mistakes an tell me about the corrections.