A good motherboard that is practically the same as the Striker Extreme is the P5N32-E SLI (not Plus version, which is not as good for SLI), and is much cheaper. Some motherboards allow for SLI, but not with full 16x for each PCI-Express slot, for example, some may be able to do 16x and 8x, but not 16x + 16x at the same time. But the P5N32-E SLI does 16x + 16x; it still has lots of overclocking options, etc., but it's just not as easy as with the Striker Ex. Be advised, though, no matter what you do, that Crysis is an extremely demanding game, and may still take a surprising toll on your brand new system. You may want to ask about which video card to get if you are going to play this game. These links may help you decide:
http://www.anandtech.com/video/showdoc.aspx?i=3234&p=3 http://hothardware.com/Articles/NVID...ashed/?page=11
If you are looking at the absolute best video cards right now, here they are in order of best to not-best (as far as I know):
ATI 4870 X2
NVidia GTX 280 or else ATI 4870 (depends on the game, but I think the 280 won in more games)
Around here is where I don't know the order for sure, but there is the (upcoming I think) ATI 4850 X2, and the already-existing ATI 4850, NV 9800 GX2, NV GTX 260, NV 9800 GTX, NV 8800 GTX and 8800 Ultra, and ATI 3870 X2.