Re: Wanting to upgrade.
If you are wanting to play games on this pc, then I would build for sure.
Here in the US you can build a nice gaming pc for between $500-$600,,,,4600 if you need an operating system.
I dont know how much it would cost in the UK.....someone here should be able to help you out with the best places to buy there.
Good luck....you will be glad you built instead of buying prebuilt.
Cooler Master CM Stacker Case
Asus P8Z68 V Pro/Gen 3
Cooler Master V6 GT Heat Sink
8 GB G-Skill DDR 3 1600
GTX 570 SLI
Asus Xonar Essence STX Sound Card
Grado RS1i & AKG Q701 Headphones
MAD EAR + HD Headphone Amp
Corsair CMPSU 850 Watt
Western Digital Black 500 GB
Crucial M4 64 GB SSD For Windows 7 64 Bit
Samsung 2494SW 24" LCD
Logitech G5 Mouse
Logitech G110 Keyboard