As I have stated before its easier now more than ever to find math rock centered info on the interwebs. Quality? well theres not a lot but when I do come across something ( cough cough New Noise Archives cough cough) I like to give props where do. The sub reddit Calculus and Whatnot is a great resource. It is frequented by good knowledgeable contributors and math bands alike.
Learn and Love it.
It is here that I happened across this very excellent three piece. Barky, a NY based avant instrumental jazz rock group. It is the main vehicle for song writer Scott Barkan. While his own work is unassumingly un math this power trio oozes with complex rhythms, brilliant stuff. Everyone here will enjoy.