One of the hinges in on my M50's broke today. Needless to say, I'm bummed and need a replacement. I was pretty content with them so I haven't been keeping up with headphone news the last couple years.
The M50x is kind of tempting, but I wouldn't mind trying something new. I would like to keep it closed or semi open back, though something with a wider soundstage than the m50s would be preferred.
I listen to post rock, electronic and some metal and would also game with them. I don't have a dedicated amp, however my motherboard has a OPA1652 amplifier built in, andclaims it can drive upto 600 ohms. Not sure I believe that though.
Budget $250 or under.