Using an Iaudio A2/X5. I want high levels of detail, I've previously owned a paid of Shure's e2c and really enjoyed them, so I thought about getting the e4c or maybe the SE310. I would first like to know your recommendations. I need portability, and maybe being able to go to the gym with them without looking like an idiot :P

Thought about Koss PortaPro. which are much cheaper, or maybe Ultrasone HFI-700 which are larger. Would have consideres Senn's HD595, but they are more quiet home listening kind of headphones.

Thanks for any help