Filed under: General Motors (GM), Motorola (MOT), American Express (AXP), NIKE, Inc'B' (NKE), Electronic Arts (ERTS)This post is part of our Money Face-Offs feature. Let us know who you think comes out ahead in this head-to-head match-up, and check out our other Money Face-Off posts.Celebrities -- they're more than superior human beings, they're money-making machines. If these celebrities were stocks, which would be the shrewd buy?Tiger Woods, unarguably the world's greatest golfer, or David Beckham, the world's best-know soccer player -- in which would you invest?The industry that is Tiger has shown consistent growth in earnings, with PGA winnings in his first 13 years as a pro exceeding $70 million. His presence in a golf tournament boosts television ratings by 50% or more. He almost single-handedly established Nike ...