Now that I have the final retail product I can quite happily say that this is the best shooter I've played to date!!!
AMD x2 6000+
4GB RAM 800mHz (Corsair)
two 8800 GTS OC 320MB in SLI
Running the game on medium settings.
I am running Vista Ultimate so get DX10.
Game looks wonderful, and I have loved every minute of it, but I am amazed that after upgrading my rig to cope with it, I can only run the game effectively on Medium settings. I know that my 8GB of RAM can't be full used and does improve the game play, but even without that factor I do have a reasonable system and yet it is only just taking advantage of the DX10 shaders.
Otherwise I love this game so far.
I completely disagree with the negative views which have followed the praise for this game. It does require a very powerful PC and if you have the required hardware the experience is obviously tremendous.
The environments are very free roaming and not as linear as the original Far Cry game. It has all the immersive qualities of FEAR and the wonderful map sizes of BF2. I think I am more into the Story Telling of HL2 and it's Episodic process, but that aside I am very very impressed with this game.
Thank you for making it Crytek :)