I bought recently my HD580. I wanted them for years, but always they were something that I could live without (expensive stuff).
Now I have them and I want to buy grills from HD600, I live in Canada and I asked sennheiser support for parts. grills are $28.40 for each. Isn't it to expensive? I also want to buy cable from HD650 and it is $16.67. Is it wort it to pay over $80 for that parts?