If you cannot get to number one spot without not paying the most let a professional handle you adwords. You should be able to get to number one spot on Google Adwords and pay less that at least the top two advertisers. The positoning algorytham is secret but based on a number of factors including relevance, site ranking and click though rates. Hey Google also want to make money and from the looks of things in the article they are growing moey on trees at the GooglePlex.