AS PER AMENDMENT 12/12/97: In this open-label, multicenter, Phase IIIB, comparative study, 825 patients are randomized to treatment arms. (NOTE: 50% of the patients will be treatment naive and 50% will be NRTI experienced.) Further, patients are randomized with stratification based on HIV-1 RNA level (5,000-30,000 copies/ml vs. greater than 30,000 copies/ml) and prior antiretroviral therapy to one of the three study arms.