What you want is something with a clear midrange. You cannot mix solely on headphones; you will have to listen through loudspeakers on some point or the mix will never balance.
Is noise a factor? Then go with Sony MDR-7506. They are clean, play loud, and are closed ear.
If you go with open ear, you will have a more neutral tone. Go with Grado SR-80 or SR-125s in your price range.