New Build - Around £500-600 - UK

Henry Pym

Honorable
Feb 10, 2013
1
0
10,510
Hi.
I'm making a new computer, and while I have a general idea for my build, I wanted to run it by you guys first and get some advice on final touches.
It's a middle-range system that should ideally be able to run games on fairly high settings, up to and including The Witcher 3 when it comes out.
It doesn't overclock.
I'd like to ideally purchase everything within the next day or two.
I already have a monitor that I'm happy with and an acceptable keyboard, but I could use some general advice on a decent mouse and speakers.
I'm currently in the London area. Because of this, I'm unsure of the best place to purchase parts, since I can't buy through Newegg here. All the sites I'm showing below are just random sites with low prices. Advice on a reliable place to buy parts would be appreciated.


Currently, my build looks like this:
Case: Bitfenix Merc Alpha (~£30)
http://www.overclockers.co.uk/mfrList.php?mfrid=556

Graphics Card: XFX AMD 7870 (~£200)
http://www.scan.co.uk/products/2gb-xfx-radeon-hd-7870-dd-black-edition-5000mhz-gddr5-28nm-gpu-1050mhz-1280-cores-dvi-hdmi-mdp-plusc

Mobo: ASRock H77 Pro4/MVP (~£70)
http://www.premone.net/asrock-h77-pro4-mvp-socket-1155-intel-h77-ddr3-s-ata-600-atx.html

Processor: Intel i5 3570 (~£200)
http://ark.intel.com/products/65702/Intel-Core-i5-3570-Processor-6M-Cache-3_40-GHz

Heatsink: Cooler Master TX3 (~£10)
http://www.box.co.uk/Cooler_Master_Hyper_TX3_Cooling_FanHeat_918287.html?utm_medium=google_shopping&utm_source=google&utm_campaign=google_shopping

Power Supply: Unsure what I'll need, I'll probably just get a 500W supply.

Currently, it comes out to around £500-550, though my budget is fairly flexible and I can spend a little more if necessary.
I think I have all the necessary parts covered, though I'm not 100% sure since I've never done this before. Omissions are out of ignorance.

Any and all advice or criticism is appreciated. Thanks in advance.