They're Sennheiser CX300 ones & although the jack plug is not gold plated they have amazing sound quality. The music doesn't go muzzy or distorted, they don't hurt your eardrum because of crappy sound, the bass isn't tinny or just a dull 'thump' noise & the sound is just pure crystal. They are also really comfortable to wear & don't make your actual ear sore as the ear adaptors are nicely padded & very, very soft. They also block out any noise from your surroundings (handy when people are annoying you) just be careful when you're crossing the road! Lol
You also get three different sized ear adaptors to put over the actual earpiece so you can customise the fit & as long as you get the correct size the earpieces will not fall out unlike most others.
They also have a nice cord length, not so short you constantly feel as if they are going to fly out of your ear but not so long it ends up almost being a noose! Lol
They usually go for about £39.99/£40.00 but Play.com do them for £17.49.
I beat both & got mine off Ebay for a bargain price so am very happy :o)
And finally, introducing somebody I know of & her blog Good girl, getting worse. Take a look & have a read! :o)