it is absolutely ridiculous that they added DX10 support too. it is unfair for the other DX9 users to get the same price for buying the game.
They should sell in a cheaper price for users with DX9 hardware and more expensive for DX10 users.
Personally myself I just hate DX10 and i wish it wont be ever successful.
its silly to buy additional DX10 hardware and plus vista so you can just play DX10 games.
its like saying "Getting gullible people to pay me $500 for just mostly snake oil"