what i found about the Grados is that they're very forgiving of the source. i brought a sony Walkman form cash converters in Stevenage, it cost me £6 and when i plugged the 125's into it, the walkman sounded great.
for me it's the lack of comfort from the grados that's the problem. i had a pair of beyers years and years ago, but for the life of me i can't remember what i thought of them. i think my brother half inched them.
i have absolutely no objection to beyers apart form the upper range get a bit big and heavy from what i understand. the fact is, i just haven't got 'round to getting another pair.
i went for the
Ultrasone 750's instead, but i have got my eyes on the DT880's if i could get the funding for them i.e. if the wife would let me.