Go listen for yourself; for mine the M50s are very inaccurate, others love them.
Check out the Shure 840s or he Sennheiser 380 - both worthy of consideration as they are good sounding enclosed cans which is what you want for tracking ; open back are more accurate for pure listening/mixing but the ones i've mentioned are pretty good overall and there's others like Ultrasone, Grado, AkG - it's a big field.
Don't just go on others opinions.
For tracking I find the Extreme Isolation headphones to be great. If you don't have an isolated control room, they can be a life saver for judging the recorded sound while blocking out a nice chunk of room sound.