Really need some advice on which full size headphone I should get given my history and requirements. Requirements: -First of all the headphones I select must be closed headphones with good enough isolation/sound leak profile to be used on planes at moderate/high volume. I travel every week and will be using these on airplanes alot. -I will be using a ipod/iphone/macbook as the source with a JDS headphone amp but it would be nice if they could also drive adequately without amp when i feel like casual use. -Music listened to is Pop/Electronic Dance/Rock History: -I first bought Shure SE535 IEM's and loved them. It was like have the vocal in your head. They got me hooked on audiophile level gear so I decided i wanted better -Currently own JH-Audio JH-16 IEM's and like them. The bass kick is incredible but I feel like I have sacrificed mids and vocals somewhat. -I really just can't get totally used to IEM's and they bug me having them in my ear after a while so I am looking to supplement them with full sized headphones. Also interested in better soundstage I think full sized headphone would give me. -After much research I bought the Beyerdynamic T5p's and knew in the first 15 minutes that they aren't the headphone for me. They have absolutely no bass at all - no amount of headphone amp or EQ'ing could give them the bass I was looking for. Also there was a considerable amount of sound leak at high volumes that would have made them a no-go on an airplane. I am considering Ultrasone Edition 8's but will consider any headphone that is a good fit. Or.... are IEM's really what I should stick with and "get used to having something stuck in my ear"?