We have a lovely new headphone sub section to the forum in Hifi.
In any case the Goldrings are comfortable, they leak a little sound, isolate you from sound very well, with and without noise reduction on and their actual sound quality is excellent. They have a neutral sound, so there is roughly an equal emphasis on bass, midrange and treble. They do bass, but only when the original recording does bass. They are not tuned like some headphones to give you deep, but artificiat bass. The sound stage is not bad for a closed back headphone, but the sound tend to remain within your head. Clarity and dynamics are very good, so you get a good rhythm and realism to the sound.
They will not work properly out of an ipod on its own as they are not very sensitive. They need an amplifier. Without you have to max the ipods volume and even they thye sound dull, underpowered and tinny. The FiiO E5 amp at £20 will do a great job. There is also the FiiO E1 and E3 to look at, all are on Amazon. If you get the 3 or 5, you should also get a LOD, which is a line out dock. That is a cable that goes from the ipods dock to a minijack to go into the amp. Such cables are very small and short and can be found for under £5 on ebay.
If you dont want to amp the Goldrings, seriously don't bother getting them