kay, erm for brakes, look towards Magura Marta's, Avid Juicy's or Hayes (I prefer Magura and Avid)

For wheels, if you want lightweight, Stan's ZTR Olympic Rims are good, American Classic are good too. My choices of wheels are Stan's, American Classic, Mavic, DT Swiss (must be a quality product because its Swiss, haha) and maybe there are more, just cant remember. Anyway some riders dont like Mavic wheels because they think there are overpriced ( I think the same too).

Oh yeah and what kind of riding are you planning to do with the bike. XC racing or XC and etc?