Hi people, I'm looking for a good pair of noise cancelling (more or less) in-ear hearphones for my new Sony HD5. I have heard from some people that using in-ear earphones over a long period of time is not too wealthy because it can damage the ear internals. I don't know it this is really true, but I usually use the device with earphones over long periods of time daily (about 5-8 hours). Does anyone knows if this is true? Thanks.