I've got the Etymotic ER-4P which are great for isolating outside noise. The downside is the cord is very microphonic, you'll hear it rubbing against your clothing when you move. Not sure I would recommend them for what you want to use them for.
what headphones work for sports and activities?
I have been walking and have noticed that I typically sweat and moisten my Grados. Are there any other headphones out there that are easier to use under this condition? Maybe the smaller style that locates in you ear? Any suggestions? What sounds best in your opinion?