I know that you are worried.
Does Kirk listen to anything other than The Mountain Goats?
To set your minds at ease, here is a list of other music I’m currently digging in my non-Apple-product MP3 Player:
Mumford and Sons, Sigh No More (God bless you, Laura Turner, for putting me on to this)
Alexi Murdoch, Towards the Sun
Radiohead, King of Limbs
I am enjoying them all, but not yet ready to evangelize for them as I am for the Goats.