Please don't get Beats or Bose. The sound quality of those is comparable to headphones that are less than $50...
You can look into Beyerdynamic DT1350 or Sennhesier HD-25 II. Both are light and portable, and just a little less than $300. Not sure if you are planning to use them at home or on the move, but you can also look into some of the IEMs (in ear monitors).
MY09 E92 335i: Monaco Blue / Saddle Brown / Grey Poplar