Case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811147153
CPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16819115077
Motherboard: http://www.newegg.com/Product/Product.aspx?Ite ...

You have mixed components from both US and CA versions of newegg.

Here is my opinion on a $1,000 US budget;

Case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811146085
CPU: http://www ...

I don't recommend you get the Sabertooth as you will not use the features it comes with. You can get a board such as the ASRock Z77 Extreme 4 for $100 less and will do what you need it to do.
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OP ...

What are you planning on doing with this build? If it's just for gaming then it's complete overkill. Even if you were rendering/editing I still doubt you will benefit from the 12 threads of the 3930K. ...

You don't need to spend your whole budget for a gaming machine, can easily get the best price : performance ratio for under $1500.

Case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811352 ...

Case: http://www.scan.co.uk/products/nzxt-source-210-elite-black-mid-tower-gaming-case-with-usb-30-w-o-psu
CPU: http://www.scan.co.uk/products/intel-core-i5-2500k-unlocked-s1155-sandy-bridge-quad-33g ...

You can do much better for 600 GBP.

Case: http://www.scan.co.uk/products/nzxt-source-210-elite-black-mid-tower-gaming-case-with-usb-30-w-o-psu
CPU: http://www.scan.co.uk/products/intel-core-i5-25 ...

Just a tip for the future, never cheap out on your power supply as it may blow and take your other components with it and no one wants that to happen.

i5 3570k
8gb ddr3 ram

I'm guessing it's 240 GBP? As I know that the pound symbol doesn't work.

GPU: http://www.scan.co.uk/products/2gb-xfx-radeon-hd-7870-double-dissipation-edition-4800mhz-gddr ...

What are your current specs? Can't really suggest anything without them due to fact that if I suggest a GPU there is a chance your CPU may not be able to keep up with it causing a bottleneck.