A very good earbud for a traveller

iam a traveller ..i brought philips go gear 4gb video player the head phone that came with that that player was good it has a very good sound effect..but as im a traveller i hear many disturbing noises outside so i can hear a less music which was dissapointing..i use this headphone only in my house to hear songs..so i decided to buy a new earphones..i selected these four head phones to buy which fit into my budget these are the only headphones that are available in my area..sennheiser cx 270,Sony Extra Bass (XB) In Ear Headphones MDR-XB20EX,Sony Monitor In Ear Headphones MDREX57,sennheiser cx 180..among these which provides an excellent sound effect and a greater headphone life...