I disagree
8600GTS performs on par with X1950pro, but since 8600GTS is DX10 then I would put it above X1950pro
Why would you put 8600GT under 7800GT !!! In shader-intensive games like oblivion, 8600GT was performing better than 7900GS, and even better than X1950pro, so I don't think that 7800GT can even compete with 8600GT. 8600GT should be at least above 7800GT