So I don't really know that much about headphones but after a couple experiences with legitimately noise-isolating and decent sounding buds, I want a respectable pair. I have a budget of about $50 or maybe more and I would prefer noise isolating IEMs but wouldn't mind a decent pair of over-ear phones either. I was looking at the Koss PortaPros but wanted something better for listening in the subway.
-small, portable headphones
-good for riding subway, general noise isolation