First off I apologize if this is not in the correct forum but the description mentioned MP3 players so I put this in here. Feel free to move if incorrect. I'm leaving for Australia in two weeks. I'm going to purchase an Iriver HP-120, and I also have a Gameboy Advance SP. This is going to be a VERY long plane ride so I want some nice headphones that will block out the noise and also not bother others. I was looking at some Sennheiser's but wasn't sure which ones were good. One model in particular was the PX 200's. Has anyone had experience with these? I really want to be able to get decent bass and turn it up kinda loud but still not bother people. If you have suggestions please do. Thank you.