Now that the C751s come with a carry case, do Denon sell spare cases? I'd like to avoid getting crap in my ears if possible.

oops. Meant to say i'm listening on an i7...

I've just got a new pair of Denon AH-C700s and there's noticeable hiss when there's nothing playing, as well as when stuff is playing. It's not a problem for Dub and rock, but it's a bit annoying when listening to something like Arvo Pärt, with a lot of quiet parts and silence. I have the volume...