I have figured out that post-rock is very good writing and editing music for me. Found a Spotify playlist called Calm Before the Storm which is nearly all instrumental. Great if you're like me and you find words disruptive when writing.
It is. The fact that they either sing in Icelandic or their made-up Hopelandic helps. Nothing to distract. Mogwai was good too, though. So was 65daysofstatic, as it turns out. So now I've got plenty to use for writing.