i have experminted with many types of different headphones. i use my i-pod outside most of the time. i wanted pairt of noise-canceling earphones. i tired a bunch of different ones. the best pair i found was the etymotic reasarch er-4. these are hands down the best pair of phones that i have used. they are a bit spendy but to me well woth the hefty price tage. here is a link to there site.
Etymotic Research, Inc. - High-fidelity Earphones and Hearing Instrumentation
they also have a pair that is noise-canceling and they work great for a cheaper price. i actually broke my er-4's a while back and was waiting for them to get repaired. i picked up a pair of shures for around a 100 bucks and they are also great. here is a link to there web site.
Shure - Earphones
here is a link to a great website that gives info on earphones and may help you in your search to what you are looking for.
HeadRoom - Right Between Your Ears
oh, and by the way if you think i-pod earphones are good then your in for a real treat if you buy one of these type of noise-canceling earphones. i-buds are basicaly garbage. i hope this helps and thanks for the post.