Buying a Gaming PC

Which one of these if any do you recommend?

http://stores.ebay.co.uk/Vibox-LTD/_i.html?_nkw=Radeon+HD+7870&x=34&y=21 

the only difference between them is:

One is a                 32GB RAM and 1TB

Second is a            8GB RAM and 3TB

And the Third is a  16GB RAM and 1TB (with windows 8 but I can buy it for 40 quid so it doesnt matter)

 

They all have a Radeon HD 7870 graphics card,

AMD FX4100 4.0GHz CPU,

Gigabyte 78LMT-USB3 Motherboard. 

By the way I can pick up windows 8 for 40 quid so the prices are pretty much the same

None of them, they're all horrible. Building your own PC is far better than getting any pre-built. The problem with pre-builts is that they usually have no named PSUs or HDDs, have a high end CPU with a low end GPU or vice versa, and are just horrible quality overall. I'm guessing your budget is £700? Does that include OS, peripherals? What games will you be playing? Do you intend to overclock? Do you want to build your own, really the only option for gaming PCs tbh.

I dont want to build my own in case I mess up, and imo these look quite decent.

I'd like to play games like Skyrim, League of Legends and DayZ