sapim spoke, hope pro II (if they do them in that size) on 823
just to add onto that the spokes would be sapim x-rays but will cost you a wallet load.
just though even lighter though.
sapim spokes, hope pro II 28 hole (if the do them in 150) on deemax. ti rotor bolts, ti rotor, ti cassette i supose to
[edit] just looked they do a 150 rear but doesn't say anything about drillings.