After lots of good reviews on a Dutch well-known forum, I decided to buy the Sennheiser MX500's. Picture:

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General Description
The MX 300, MX 400 and MX 500 are stereo in-ear headphones for listening 'on the move'. Very lightweight and comfortable.
Features
* Wide dynamic range
* Excellent bass response
* Dual-sided highly conductive OFC copper cable
* Can be connected directly to personal stereos, CD players, DAT recorders and hi-fi system
* Additional volume control
* blue metallic
* 2-year guarantee
They cost me about 20-25€. After half an hour my ears started acheing ! I heard such good reviews about them, quality-wise. Well, I think quality-wise they are crap. The average Sony Fontopia is a lot better than this and certainly a lot more comfortable. The volume control was crackling after a mere month or so already.
So I purchased the Sony MDR-Q55SL's. 49€ they cost me. Picture:

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Features:
* Clip type headphones
* Turbo duct for extra bass sound
* Driver unit 30mm
* Neodymium magnet
* Gold plated plug
* OFC cord (0.5 +1.0m)
These have excellent sound, they are comfortable, and they have a very nice cable. That was my first thought. After walking around with them for almost 4 months, one of the sides didn't work anymore. Luckily, warranty to the rescue and now I can pick a headphone for about the same amount of money. Good, because I don't want this kind of headphone again. It is comfortable, but the hing didn't clamp hard enough so it easily comes lose or moves about your ear. Not something I like when I'm walking, to have to adjust it every 2 minutes. The cord is something extraordinary. It's very strong, but likes to curl. It has a longer cable for the right side so it hangs in the back of your neck, which makes it harder to come of when pulled on the cord. So I think I'm going to go for the ones I had my eye on just after I bought the Q55SL's.
The Sony MDR-EX71SLB. They cost about the same. They should minimize the external sounds which the other 2 didn't at all. It also had 3 different ear bud thingies, so atleast I now can choose another size if they don't fit. Picture:

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Features
* Closed inner ear type Fontopia earphones
* Superb sound quality
* Straight plug & extension cord for compatibility with Sony WM remotes
* 80% more powerful than other Sony Fontopia earphones
* 3 interchangeable earbuds (S,M,L)
* Carrying pouch supplied
* Driver unit 9mm
* Neodymium Magnate
* Black
Anyone who has experience with these ?