I'm looking into closed, portable headphones (new or used) that are no more than $60 and can be easily driven from an iPhone. I prefer one with a decent bass response, but also have enough clarity that won't block out music frequencies. I've been reading a few reviews and came up with this short list. I was going to include the PX 100-ii even though they are open, but a few people claimed they leak way too much.
AKG K 518 LE
Sennheiser PX 200-ii (not sure if I could find them for $60 though)
Any suggestions or recommendations would be beneficial to my search. Thank you for the help.