"Arny Krueger" wrote in message
...
"Robert Morein" wrote in message


snip

I think that the best strategy for Steve is for him to wait until he gets
the phones, listen to them for a while, and then take what he thinks is
the
appropriate action.

Agreed. I have the 580's and the Grado SR60's, and have found the SR60's to
work somewhat better on certain applications (PC sound cards, portable disc
players). However, I wouldn't invest in a headphone amp unless I could try
it and return it if the sound improvement wasn't noticeable.