What would you guys propose for someone who wants something portable and loves the ortho sound of the HE-500. They must work for the gym or out and about (little sound leakage, hold position or seal well, etc). They don't have to totally mimick the exact dynamics, but I'm looking for clarity and instrument separation. Soundstage is less important on the go, since I won't be closing my eyes much and my visual cues will limit me from allowing the soundstage to expand to otherwise attainable levels like it would if I could sit back and close my eyes.
Thanks for your expertise!