Sorry to repeat my question yet again... xP
But, i'm curious to know what kind of (portable) amps you people are using/recommending for you 580's?
I've mentioned before, that when used with my iPod nano, the sound is less than optimal in terms of volume.
Someone previously suggested a specific amp, but it was dead expensive, and it wasn't exactly portable.
Anyone have anything to share in this respect, please. = )