I am afraid that I will dissapoint you a bit, I am not sure that this is the optimal system:
You have two GTX590 inside which means four GPUs but my feeling is that you run the game only on one GPU (so, the other three GPUs are an overkill...)
Secondly, each GTX590 cards has 3Gb VRAM to share between the two GPUs. This means, when you will start using SLI, each GPU will have only 1,5Gb VRAM.
The best card for the game currently is the GTX580 3Gb (my 2cents)
And the video is already available thanks to Tuckie:
http://forum.1cpublishing.eu/showthread.php?t=24093
Apart from that, great PC system!
~S~