ATI Radeon x1900xt and DX10 cards build QUESTION

HI, im planing to build a new system(mostly for gaming/office work), i think i will use in it the ati x1900xt gpu (paired with Intel Pentium D 950 (3.4) cpu, and 2 gigs of ram-later on maby 4, but thats way later on )

and now the question:

Will the ati's x1900xt last me for 2 or 3 years so( i mean till i wont be able to play anymore game because the card will be incompatible) i could be able to play games atleast on high(later on medium) Quality lvl's that will come out in 2007/2008

For those who heard about theis game: "Alan Wake" Do Yo uknow Wheather I will be able to play this game ith the 1900xt series gpu?
I know its a dx10 game, but will it look relatively good with playable ftp's?

This question has been asked here maybe 50, even 60 times in the forums. Here's the summary:

-DX10 games should support DX9 shaders, but DX9 cards won't support DX10 shaders. (Yes, your Alan Wake is playable, but not with DX10, only DX9)
-No card out right now is DX10. (X1900XT will be running DX9 fine, but it can't run DX10, for simplicity's sake)
-DirectX10 is coming out relatively soon, provided Vista doesn't get held back any further. (If there's one more holdup, I'm going to rip off my hair in anger)

On a side note, make sure you buy a motherboard that's Conroe-compatible. Wouldn't want to get a shiny new motherboard and have to replace it soon.

actually if u grab the Intel Flagship mobo, 975x chipset thats the mobo intel uses for all the conroe benchmarks so it;ll work

I believe the new revision hasn't hit the streets, so it doesn't support Conroe YET. Next revision it should, I believe.