Deletion of The 440 Alliance

Comment: I agree, this is a particularly tough one for me. A strict application of the guidelines would probably make me come  out with a very weak delete, but they seem so close that one good source would put them over the top.  I'm considering them under criterion 7 of  (representative of particular musical style or local scene), but even then I'm having difficulty nailing down the kind of source that I'd like to see
Stance: comment
Cited policy: Wikipedia:Notability (WP:MUSIC)