Meh the Asus Striker Extreme isn't that good, trust me. I have it on my brothers build, and its already deleted the RAID array I created.
It's also in my eyes, impossible to overclock very well, compared to like say, an Abit. Its expensive too, considering you don't get anything extra really worth having.
Instead of the 8800GTX, go for the 8800GTS (512 version), as it'll perform almost as good for half the price.
Also for the processor, just get a Q6600 and overclock it with a good motherboard. There is no point spending THAT much on a processor when you can do the manual work, and get something faster than that at stock. Its just a waste of money in my opinion, as with getting the Q6600 (A LOT CHEAPER) you aren't missing out on anything that you can't manually perform yourself to get the same speed. Trust me.
You'll save a lot of money, something you said you wanted to do.
Good choice on the Samsung hard drive though. They are amazing for the money, and very quiet too.