In this video, David Williamson reviews some of his favorite biotech firms. Many analysts have thrown their weight behind Biogen (NASDAQ: BIIB) and its new BG12 drug for multiple sclerosis. However, David favors Gilead (NASDAQ: GILD) over Biogen since Gilead has a larger, more diverse product pipeline. Celgene (NASDAQ: CELG) is the No. 1 biotech in David's opinion since it also has blockbuster drugs but a PEG of less than 1.0. Amgen (NASDAQ: AMGN) is a big company with more products in development than most people realize. Overall, for value and future earnings potential, David likes Celgene the best.

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David Williamson has no position in any stocks mentioned. The Motley Fool recommends Gilead Sciences. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.