I don't have time to find specific parts for you right now, but you can definitely find a lot cheaper cases than that.
Also I would recommend Kingston HyperX blu 2X4GB RAM it's cheaper and it's good.
If you don't definitely need a DVD-drive you could shave that off the price since (asuming it's for gaming) you'll probably buy your games as downloads.
I realize this is vague, but you can likely find cheaper MB's that are good enough for your build.
Again if it is indeed for gaming I would recommend a better GPU that that. Again I'm going to leave that to you or someone else here.
UPDATE:
Oh I see you already got a very good answer.
It seems a really good build. This is quite pointless now. Ignore this.