Hey guys, I finally have enough money to spend on a decent pair of headphones for my iPod Shuffle and I'm really interested in the Etymotic ER-6i Isolators (white). I want earbuds that totally block out all other sound so I do not want any large, normal looking headphones that go over your head. I read the old review of these on this site and the only problem I'm thinking of is that you must keep replacing the filters. Also, I'm not sure if they would be comfortable. What type of headphones/earbuds should I get because the stock Apple ones are horrible. Thanks so much for your help.