Looking for details and opinions on these 3 sets.
Obviously the M-Duo are the better headphones but as I have read re the A151 they are more for a specific class of music.
For EDM, Rap, Rock etc the SP51's performed really well.
The EDM headphones I am aware are close to the M9's but I have never owned the M9's but I do own the M6 and I find them to be inferior to the R1/SP51 etc.
The design of the EDM headphones I like and they seem to be bass heavy which I also like but would not want to sacrafice overall sound quality for better bass.
The M-Duo reviews seems either really great or so-so, not sure if those are worth the investment at this time.