Makin the jump huh? Peabody, I have no use for earbuds/IEM's. The only virtues are compactness and efficiency, but that's just me. Have you checked the new HD-218? They are closed back and offer a good amount of isolation. Enough to block out the steady acceleration and braking of a bus? Probably not, but please put these on your radar. I tested a pair and in a busy store with music in the background they isolated quite nicely in combination with the music. Only 24 ohm so they drive real easy and seperate quite well, not too bassy either. My only beef is they are supra fit. Wish I could help you with an earbud suggestion but I'm as clueless as a WalMart electronics clerk...Chubbs

Review:
http://www.headphone.com/products/he...er-hd-218.phpp

Purchase:
http://cgi.ebay.ca/Sennheiser-HD218-...d=p3286.c0.m14