My recommendations:
Lower-budget closed-back >> Audio Technica ATH-M50
Higher-budget closed-back >> Denon D2000
Lower-budget open-back >> Sennheiser HD598
Higher-budget open-back >> Beyerdynamic DT990 32 ohm
Also, to back up bbophead, any Grado.
Of course, everything in this thread will only be an idea. Research what we suggest before buying!