I try to run in groups because talking to people helps pass the time (and distance). But when I run solo, I don't want to look like a crazy guy talking to himself, so I listen to tunes. I've been using the kind that hook behind my ears, but after awhile my sweat runs down the hooks and into my ears. It's quite annoying. I've also used Apple earbuds without the sweat issue, but they don't produce great sound. Anybody have any good suggestions? Hopefully something that won't cost more than the marathon I'm training for =)