Ti Phat
You just cannot beat a Ti hard tail, for drop dead looks and pure performance. I acquired a NOS Torus XT team a while back and have totally re built it from the ground up, as much Ti as possible with an odd smattering of red Ano' all ceramic bearings. Easily the fastest mtb I have ridden, currently stands at 19.5 pounds (rigid UGLI Ti Fork) and could easily lose another 4 pounds. Can't wait to see you build up on this!