I need advice on a nice pair of headphones/earbuds. I would love to have pro earbuds such as the Etymotic Research ER-6 Isolator Earphones because they are small just like an iPod so I can throw them in my pocket or whatever. If there are no decent earbuds then I might check out the common, large, over-the-head headphones because I'm sick of the cheapo Apple earbuds that come with the iPods. They are pretty bad. So have any of you guys had any experience with the Etymotic Research ER-6 Isolator Earphones? I'm going on a trip and I need some nice sound isolating earbuds for the trip. Thanks!