Considering dropping a few hundred $s on IEMs, but want to know if custom fit monitors are wort it.  Anyone have a life changing experience when making the switch?  I mainly use my portable rig when traveling on the subway (NYC), in my office, and when I travel for work (airplanes, hotel rooms...

anyone have a comparison of the Noble 4 to Shure SE535?

Requirements: Looking for IEMs Should have at least a six hour battery life Doesn't need to absolutely fit in my pocket but shouldn't be a desktop amp that happens to have a battery. What are my options for pairing with my iPhone 5? I also have an iPod Classic, and i would consider a new...