You can find Directx10 for WinXP... it's out there, not offically, but it's out there. My friend has the Nvidia 8800GTX, that monster $600 VC... I haven't seen FSX perform on it, but right now there is nothing that taxes that card. Even at 1900 resolution.. Gddr5 spec just came out so things are going to get interesting in the next 6 months or so..
I have to up grade soon with Crysis and other huge games coming out this fall..
I pledge to treat Barry Milhouse Obama with the same respect that the left treated George W. Bush with for 8 years.