I've got a site that is 9 years old with over 1600 unique articles. I would like to change the name of the site but keep the current domain. The name of the site is not a good keyword and I know with its age and reputation I could rank well if I changed I had a better keyword. It's just the homepage I'm talking about for the keyword, the articles are O.K. What effect could changing the site name have and is it more likely to be a negative one?