I love the ER4's on planes, the isolation and the flying gives such a surreal, ethereal sense. But I'm not always in the mood for their sound signature.   Are there any other IEM's that offer this kind of isolation, or at least something close?   KP

Hi, all. I am looking to squeeze some value out of my main rig front end: Audio Note 3.1x Balanced Da with Siemens cca & Bendix 5852 rectifier, McIntosh (no relation to Apple!) with Mullard CV4024 C2200 pre-amp. My plan is to run about 30 feet of low bap xlr cable to my office and/or...