My old Sennheiser CX 300 II was certainly not a bad headphones - but the IE80 is sonically a hammer. Even if it costs a lot of money - he is worth for me. Man listening to music so clear, balanced and with a strong and well-tuned bass, which is also regulated by screw at the individual earphones. One has to have really never heard the feeling many pieces correctly - goosebumps.
Accessories plentiful: Various rubber adapters for different ears, stable quality storage (9,5x7x2,8 cm), not so stable lapprige connecting cables that are even interchangeable, if you like other (via plug on the headphones), an ear hook, clip for Kabelbestigung at clothing and a comprehensive guide.