I have the Future Sonics Atrios with the NEW MG7 dynamic driver so i can speak about them. The bass is really something special on the Atrios. The bass is rich and astoundingly deep. Bass response is excellent: it goes deep and is very articulated. Pitch and texture of bass frequencies are presented very well. The Atrios have quite a bit more bass than Shures or Etymotics, but the bass does not overwhelm the mids; it doesn’t make the overall sound muddy in any way. Contrary to bloated bass-monster IEMs like the Super.Fi 5 EB or the CX300, the Atrios can be seen as the "bass reference" for IEMs and would fit well with the kind of music you listen to...Trance/Techno. The Atrios are also warm earphones so If like that kind of sound signature then they may fit you well. I can't speak about the Westone 3's because I don't know much about them or ever tried them.