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.