[DocMartin]

Thanks for the comments, I'm picking up a pair of Sennheiser PX200's (closed and very portable) for my iRiver for now and I'm getting the Shure E4's when they come out. The Beyer's looked a little better quality-wise but I decided on the Senn's since they are smaller, lighter, less expensive, fold up nice and I wont have to worry as much about beating them up while traveling.