Help On A Build I'm Buying

[Zee89]

I just found the website pcpartpicker and I was totally amazed by the prices there, I was going to customize and buy a computer from pcspecialist but just noticed that buying the parts and building it myself would save me a whole £200! Result! Before I purchase the parts I was really hoping the people here could review the parts I've chosen, and I was hoping you guys could show me better parts. Currently the build only costs about £815, but I have a budget of £850 to spend. Here is the current build from the website.
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor (£161.99 @ Aria PC)
CPU Cooler: Arctic Cooling Freezer 7 Pro Rev.2 45.0 CFM Fluid Dynamic Bearing CPU Cooler
Motherboard: Asus P8H77-V ATX LGA1155 Motherboard (£85.80 @ Dabs)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£31.76 @ Amazon UK)
Storage: Toshiba 2TB 3.5" 7200RPM Internal Hard Drive (£90.27 @ Amazon UK)
Video Card: EVGA GeForce GTX 670 4GB Video Card (£350.99 @ Dabs)
Sound Card: Asus Xonar DGX 24-bit 96 KHz Sound Card (£22.21 @ Scan.co.uk)
Case: Cooler Master Storm Enforcer ATX Mid Tower Case (£70.78 @ Scan.co.uk)
Optical Drive: Lite-On iHAS424-98 DVD/CD Writer
Operating System: Microsoft Windows 8 Full (64-bit)
Total: £813.80
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-01 19:40 GMT+0000)

One question - Do I actually need a soundcard or does the motherboard have a built in one? I don't care about how good the quality is, I just want to be able to use my headset and microphone for gaming. So yes, if you guys could improve my build where necessary, please do. My maximum budget is £850 so if there are any improvements that can be made within that, please do so. Thanks a lot for the help guys!

Edit: Just noticed I missed the power supply, if you guys could pick one out it would be much appreciated, thanks.

 

[g-unit1111]

Yes you don't need a sound card - the audio built in on your motherboard is fine.

That build looks pretty good with a couple of notes:

1. You can't pair a 3570K with an H77 motherboard as that prohibits access to the multiplier. You will need something like this: http://www.scan.co.uk/products/gigabyte-ga-z77-ds3h-intel-z77-s-1155-ddr3-sata-iii-6gb-s-sata-raid-pcie-30-(x16)-d-sub-dvi-d-hdmi-a *OR* http://www.scan.co.uk/products/asrock-z77-extreme-4-intel-z77-s-1155-ddr3-sata-iii-6gb-s-sata-raid-pcie-30-(x16)-d-sub-dvi-d-hdmi-a

2. Arctic Cooling fans are crap, I had one and the thing broke in several pieces and was a pain to install. This will be a better cooler: http://www.scan.co.uk/products/cooler-master-hyper-212-evo-4-heat-pipes-direct-contact-with-120mm-quiet-fan-lga775-1155-1156-1366-a

3. Better hard drive: http://www.scan.co.uk/products/1000gb-western-digital-wd1002fbys-re3-sata-3gb-s-7200rpm-32mb-cache-ncq

 

[Zee89]

Thanks a lot, could somebody pick out a PSU for me?

 

[g-unit1111]

Thanks a lot, could somebody pick out a PSU for me?

Here you go: http://www.scan.co.uk/products/650w-xfx-pro-series-core-edition-p1-650s-ukb9-85-eff-80-plus-bronze-sli-crossfire-eps-12v-fan-atx-v2