(Photo credit: William Purnell-Imagn Images)The nation's leading scorer faces the nation's second-best defense when No. 16 BYU hosts No. 8 Houston on Saturday night at the Marriott Center in Provo, Utah.BYU's AJ Dybantsa tops the country with 23.9 points per game, but will face his stiffest test to date against a Houston defense that has allowed just 61.4 points per game.Dybantsa, regarded as one o