click on the number 2 and it says so... i just saw this when downloading the graphics drivers (the link will prompt you to download something, just click no)
brutal reformat really.... a few errors in the hard drive and stuff
The "best bang for your buck" = the most frames per second per dollar.
In which case I'd would think its the 7600GT ... TomsHardware did a test for CPUs that gave the most frames per second per dollar and it was the Athlon 64 3000+, but I don't know if they have done it for video cards.