Really I'm looking for any portable headphone that will still allow me to still hear what's going on around me--particularly voices--without bleeding sound out to everyone else, while listening and low to moderate volume. Around $30 would be preferable, but I'll go up to $60. I'd probably just get PX100s or PortaPros but I'm concerned about sound leaking out. I used to have Yuin PK2s a couple years ago (until I lost them at airport security... grrrr) which I liked, but these are more than I want to spend now and it frustrates me remembering I only paid something like $55 for them at the time. If there are canal phones that do a bad job of keeping out outside noise I would consider them.
So what are my best options here?