Detailed graphics card specifications and reviews are great - that is, if you have the time to do the research. But at the end of the day, what a gamer needs is the best graphics card within a certain budget.
http://www.tomshardware.com/2008/01/03/the_best_gaming_graphics/index.html
http://www.tomshardware.com/2008/01/03/the_best_gaming_graphics/index.html