Hi,
wolftone - welcome to GMG!
I haven't listened to any of
jessop's recommendations, but I'm confident he won't steer you wrong. He's a young man of remarkable perception and taste. If
some guy happens to chime in here, his suggestions will be good too.
Actually, my mind tends to roam toward jazz/free improv, rather than classical (though in this area the distinctions get pretty blurred), when it comes to music like this. I see you mentioned AMM, so I know you're already at least somewhat familiar with the territory.
Here's one that came to mind:

(That says
Fuchs, not, uh, that other word.

) It's six musicians, led by Wolfgang Fuchs, playing six compositions - hence the title.
This one is by a duo called
furt, which is Richard Barrett and Paul Obermayer. It may be a little hard to find at a decent price, though.
jessop mentioned electro-acoustic, so if that interests you, there are also several recordings by Evan Parker's group. Here's one:
