the graphs you posted don't show the 2900. dx9 is where this battle is being fought like it or not, there are no dx10 games out and won't be for a few months. by the time dx10 has enough games to make it important to switch cards all the cards mentioned will have been passed up by the r650 and 8900. that said i am getting mine monday but will be replacing it when r650 is available.
also elsewhere in this forum is tests with the microsoft dx10 sdk and the radeon beats the g80.