Re: Buy me the first 8600GTS hehe!!
DX10 is quicker the DX9, theoretically achieveing slightly higher settings with a lower powerd card whilst maintaining the same frame rate as in DX9. Meaning Although a 8600GTS and X1950Pro are very equal performance wise, the 8600GTS is the same price, and DX10 compatible so you would be able to slightly raise the setting in DX10. It MIGHT be a good investment for me and others, who need performance in Dx10 games without busting $$$.
I would expect the following DX9 Cards a 7900GS/X1950Pro to 7900GT/X1950XT to have quite a drop in price, as the 8600GTS is equal in performance, renders DX10, and is the same price.