I will be using the headphones exclusively for commuting and walking around noisy city streets with my iPod Nano. I prefer something foldable or collapsable, and something that *will* sound better than the Sennheiser PX100s they're replacing (considering I'm willing to spend almost three times what I spent on the Senns).
Music: rock, podcasts and audiobooks.
I don't mind sealed cans, especially in cold weather.
The headphones I am considering:
AKG K 26 P ($45)
Beyer DT 231 ($60)
Grado SR 60 ($70)
Anything (a) better-sounding and (b) still small(ish) and portable, for this price .... or up to $100 ?