I just purchased a set of these for my ipod and, what an amazing pair of earphones these are! Expensive at £120 but worth every penny, very comfortable and easy to fit.

You get 5 sets of ear tips at different sizes, an attenuator, jack adapter and a nice carrying case.
The model i purchased was the SuperFi Pro 5 which has dual speakers in each earphone. The £209 Triple Fi model has 3 speakers for bass, middle and treble but was a bit too steep for me at the moment.

I'm not rich but had a nice £450 bonus at work which paid for these and the ipod touch Anyway if you are interested, check out their site at Ultimate Ears Earphones Headphones Personal Monitors