I'm planning on getting either the IE80s or Sony EX1000. right now I'm using a 2nd gen ipod touch. now i know very little about impedance and all that so I'm unsure if an amp is necessary. the impedance of both IEMs are around 32.

I owned the HD650 for about 2 years now but iv decided to go for a more portable approach to my music. i originally decided to go with the westone 4 mostly cause the pair i picked up were only $300. at first i thought they were very muddy sounding but they started growing on me. i loved the...