yay! Keith Rowe is fantastic.
Much of his recent work has been documented on
Erstwhile Recrods. I would say his solo disc, The Room, from last year is an excellent place to start.
Maybe also look into some others working in a similar area:
Otomo Yoshihide, Sachiko M, Toshimaru Nakamura, Oren Ambarchi, Taku Sugimoto.