Momentums should be more neutral in comparison with M50s. I think SoundMagic HP100's are probably your best bet at 200.
You can read about them here:
Wow I must say these SoundMagic HP100 sure do sound great (no pun intended). And for 200$,it really might be the winner here... Well thank you really much guys, never thought I'd get so much support.
Okay so if you guys have any other suggestions or know a bit about the SoundMagic HP100 please let me know!