Help with parts for a mid/high range PC

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http://www.tomshardware.co.uk/forum/353572-13-build-upg...

Good picks in general. Yes, keep the 212 EVO.

You need at least 550w power supply to meet NVIDIA's power requirement for the gtx 570.

As long as the hard drive is SATA it will work fine.

I would get a cosair 650watt psu (they are well known quality) and a gtx 670.
Whats your budget?

Edited OP with answers.

I agree with above comments. I don't like the power supply you picked, get a Corsair or Antec instead. I would also pick one with a little more power in case you want to upgrade your video card or other parts in the future. For instance, here's the power supply I've put in my build from last year:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Yes the CPU comes with a heatsink (if you pick the retail version, not OEM). And it gets the job done if you don't overclock and have good ventilation in your case. For instance, I have a similar CPU (i5-2500K) with a stock cooler and my temps are 32C on idle and 55C under load which are more than acceptable. My case is an Antec Nine Hundred which has many huge fans so of course this helps too. *** Edited: OK I just saw that you updated your information and want to overclock, so in this case, yes that Cooler Master Hyper 212 heatsink is a good idea. ***

For the hard drive, don't worry SATA has been the standard for a long time so it will work no problem.

Concerning the sound card, it's really up to you. I don't like integrated sound and I listen to a lot of music so sound quality is very important for me. But some people just don't care, as long as they hear sound it's ok, so as I said it's totally up to you. If you get a nice sound card of course you will also need good speakers to go with it. I'm currently using an Asus Xonar DX 7.1 and I think it's a fantastic sound card and a very good bang for your bucks:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Thanks for the help so far everyone, I really appreciate it. I updated the OP and added a link to the PC Part Picker page. And I think I'm going to end up ordering a sound card later to save a little cash now. Unless I'm overlooking something, I think I just need to find a case. Any recommendations? I'm not too picky really. Something middle of the line price-wise.