[daniel521]

Quote:

256kbps AAC is what iTunes uses, yes.  Normal high-quality music should be ~320kbps MP3, but 256kbps should be about equivalent with AAC (which is a more efficient codec).
 
What will you be using to amp the HD600?

either the NFB15 or the asgard + HRT MusicStreamer II. I'm still deciding if the second option is worth the extra money.

 

[SONIC BOOM]

If you have a decent dac you probably wont be able to tell much of a difference unless you have really revealing headphones.

 

[someperson]

How is the soundstage compared tot he 558?

 

[NimbleTurtle]

Quote:

How is the soundstage compared tot he 558?

Haven't directly compare them. However, the HD 558 was designed to have superior soundstage. 

 

[SONIC BOOM]

I don't have the 558s but I do have the 598s and the sound stage feels bigger than the hd600.