Kanye West’s 496,000 gives him his fourth straight No. 1 album on the Billboard 200 and the fourth-best sales week of 2010. It’s also a better launch than the 450,000 that greeted his last set, 2008’s “808s & Heartbreak.” As for Minaj, she racks up the second-best sales week for a female hip-hop act. Only Lauryn Hill has done better, when “The Miseducation of Lauryn Hill” started at No. 1 with 423,000 in 1998.