I love them... I was never into headphone hi-fi, although I bough AKG k-77, and k-240s a few years ago, for my mixer and synths, but I never really enjoyed listening music through them, For music listening I use my rotel and B&Ws.
I bought them last week just becouse I believe the pink ones are the prettiest phones around, and I was amazed by the bass and over all sound quallity, Sure the 1st day I listened to them I didn't like the sound so much but after a week, I have to say they are superb (for 52 euros phones).
I use them with my dared mp-5 amp, but insteed of the not so good build in dac, my source is the m-audio audiophile 24/192, I also use the software m-audio equalizer to balance the brightness.
I'll give everyone a tip, use equalizer to cut some dbs around 10 khz and boost frequencies around 1-3 khz.
with this setup I would give them a 4 out of 5
with iphone 3 out of 5