Snook's computer. (Compiled a list for him)

Snook!! You left the server too early, anyways. Here's the build I compiled.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($189.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($32.98 @ Amazon)
Motherboard: Gigabyte GA-Z77X-D3H ATX LGA1155 Motherboard ($127.98 @ SuperBiiz)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($49.99 @ Newegg)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive ($89.99 @ Microcenter)
Storage: Crucial M4 128GB 2.5" Solid State Disk ($104.99 @ Microcenter)
Video Card: EVGA GeForce GTX 660 Ti 2GB Video Card ($303.98 @ Newegg)
Power Supply: Corsair Professional 650W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($99.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($18.98 @ Outlet PC)
Total: $1018.87
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-18 10:53 EST-0500)

I know it's a bit over your price point and if you need a case, mouse, OS, etc. Dropping the GPU to a GTX660 should be fine. The PSU is a bit on the pricey side, so you could find cheaper, however, it is modular which means you only need to use the cables you need, and it has a bronze certification so it will be very efficient with power (saving on energy bill). Also, the PSU is very important, a bad PSU could damage your whole system. The aftermarket cooler is only if you want to overclock the i5. If you don't, I'd say this is a very capable CPU however you won't have much OCing headroom. Leave any questions down below.

Id recommend using AMD to shave off a bit of money

GIGABYTE Mobo: $89.99 (-37.99)
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128521

AMD Processor: $104.99 (-85.00)
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103996

That's true. However, I haven't dabbled in AMD yet, as of now all my builds have been with Intel/Nvidia.

That is the Cpu i am looking at but its an upgrade i am doing so i am just buying motherboard, Cpu and maybe ram and power supply (Fully Modular or Semi Modular).

e.g http://www.amazon.co.uk/Intel-Generation-i5-3570K-3-40GHz-Technology/dp/B007RUZKK6/ref=sr_1_1?ie=UTF8&qid=1361209050&sr=8-1

http://www.amazon.co.uk/Asus-Motherboard-CrossFireX-Intelligent-Processors/dp/B007KZQE7Q/ref=sr_1_1?ie=UTF8&qid=1361209055&sr=8-1

Can anyone recommend a decent PC case as the current is way to small.
This is for my family's PC as my laptop is broke and it is out of warranty so i am sick of it as it has broke down like 5 times.
I have £500 which is equivalent to $776. I don't want to spend it all just want vital componants for a pc, also no need for a graphics card because there is already one i can bare with which i can upgrade in the future.

My mum is also paying as well so we will probably go halves as it is for the family PC.

I can recommend *against* rosewill cases, at least their redbone one. It's supposed to be rated for atx form factor, but it just barely fits.

I'd reccomend something from either Corsair or NZXT. From what I can tell they have great build quality, although they are mostly on the pricey side $100+. Cooler Master is good for cheaper cases, but I find their build quality sub par. I have a CM Elite 430, and it fell off my desk 2.5ft. It has a fully metal construction and the side doors are so bent out of shape I can't even close them fully.

I am looking at:

http://www.amazon.co.uk/CiT-Vantage-Type-R-Gaming-Reader/dp/B0064LFTR8/ref=sr_1_4?ie=UTF8&qid=1361209067&sr=8-4

http://www.amazon.co.uk/gp/product/B004REHPD0/ref=noref?ie=UTF8&psc=1&s=computers

£1 = $1.55