Best "ear bud" headphones?

[Andybtsn]

While my quest for a decent MP3 player continues (currently considering the Creative Zen Vision:M, Iaudio XL5 and Istation I2)

With any of these players I will no doubt have to upgrade the headphones, what are my best options for under £50?

I liek crisp sound but also with the option I can have heavy-ish bass too, asking too much?

I listen to metal music mainly.

Thanks

 

[Andybtsn]

Funnely enough I have just been looking at them.

SHURE Acoustic headphones E2c translucid

"Why settle for standard earbuds when you can step up to the rich, full range sound found in Shure E2c Earphones? Their sound isolating sleeves block 2 to 7 times more noise than Noise Canceling headphones with no hiss added and no batteries required, so you’ll hear every detail, no matter where you are. "

Just a bit cautious of what there like for bass?