1. Solís: Quiet Superstar Spreads His Base

    October 19, 2004 12:00 AM EDT Excerpted from the magazine for Billboard.com. In the last 30 years, Marco Antonio Solís has sold millions of albums as a leading Mexican grupero artist. Now, with the Nov. 2 release of "Razón de Sobra," he hopes to further build on the mainstream pop success he started with 1999&…