Did you read my entire post? I clearly stated why I find it humorous to try and have a portable rig of uber high fidelity. If the sound from your environment is leaking in all around you, you aren't in an ideal environment for critical listening, IMHO. You should be aware of your surroundings when you are out and about, don't you agree? How / why would you try to elicit every subtle nuance out of your music in a very distracting an noisy environment? When you listen to your 2-channel gear, do you invite the neighborhood kids over and feed them a bunch of sugar so they are bouncing off the walls, making a ton of noise, while you are listening to your rig? I don't know about you, but I like my listening environment to be as quiet as possible and free from distractions. That isn't what you get in a portable headphone set up, unless you go to a quiet park to listen?