Got M-80 and becomes my every day headphone since early this year.   I don't like the stock cable with phone control buttons so I make a custom OFC cable, sound is a little bit improved and become smooth.   Most of the time I am playing 40% pop, 30% jazz and 30% classical, not so many dance music.   Today I brought an album "Random Access Memories" by Daft Punk, this is the number one album recently on many charts.  I know why, the sound is so rich and dynamics with M-80 , make me rock with music, and I never think M-80 can deliver this...

M-100 is a very easy to drive headphones.  Before that I am using M-80s on-ear, and really do not belive any headphones can replace it.  As the M-80 can deliver very high quality audio even with bare iPhone 4S with lossless music tracks!  With an headamp the sound is just bigger and better a little bit but it is not 'day and night＇difference.   The first hour I tried M-100 I found the bass a bit too much, maybe I have used to M-80 sound.  But after a few tracks I feel that all music becoming more rich and help me to get higher involvement.  And...