I'd consider dropping the GTX 570 and going for GTX 460 1GB SLI or Radeon HD 6850 CrossFire build.
It'll save you a little bit of money, but it still runs better than a single 570. However, there are things to worry about when it comes to dual-GPUs, so keep that in mind. Not all games support it for one, but I'm sure the PSU you buy will be able to handle it. (I 750W handles it fine, and I'm sure there's room left.)
Here's basically why I suggest this;
You must login or register to view this content.
You must login or register to view this content.
Also, sorry to anyone else may have already said this, I didn't see it.
EDIT: Even though the dual cards may get hotter, you're still getting better performance for a lower price, and you could spend the money you saved on keeping the cards cool. So either way, you're winning by go for SLI or CF compared to paying for a single GTX 570 that performs less desirably.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I'm not much of a peripherals guy, so I'm only going to suggest components. When it comes to monitors, mice, and keyboards, I could care less.
Significantly better HDD for $5 more -
You must login or register to view this content.
Case: Your case is fine, and might even save you money on cooling.
PSU: Your selection should be fine.
Motherboard: You may be able to find one of equal quality for a better price. I'd recommend a P67 over a Z68 for gaming any day, to be honest. -
You must login or register to view this content.
RAM - I don't like DDR3 1333, but I suppose 8GB is a good deal. You could go for that, or try to find around 8GB of 1600 for a little more cash.
As for a CD Drive/Blu-Ray Drive - you could find one for like $20. Don't worry about anything "high-tech" about those. A disk drive is a disk drive.
That's pretty much all I have to suggest.