Which one of these 2 PC's should I buy?

You can build one by yourself!

The second one if your main purpose is gaming, the first one if you want to do some CPU intensive processes(like video editing or so)

None of them, build your own. Its cheaper and you can focus the specs on that what you´re planning to do on your machine.

Build one yourself. You'll save a lot of money and you'll have great PC. I'll soon build my own! Just need to decide which case to buy...

Amd gpu...

EPIC WIN

I agree with your reasoning, so the second.

Build yourself = cheaper and better.

Everyone would recommend building your own, but the first has a faster CPU and a slightly slower 7770 GPU, as compared to the second which has a slightly faster GPU but a much slower CPU. Considering the price difference, and considering that you're planning to upgrade anyway, I agree with your reasoning to get the second one for now.

Just a reminder, changing a GPU is much easier than changing CPU, since when you choose to upgrade your CPU, you will most likely (almost certainly) need to change your motherboard too. When you want to upgrade GPU, you won't most likely need to upgrade anything else unless you get really crappy PSU.

I would personally go with a stronger CPU, you might even want to get a high end AMD cpu and settle with dedicated card for time being (AMD has quite good ones atm.) and get a discrete one later on, when you save enough money for a good one (150-250 bucks).

Neither. Assemble a custom system.

The second link doesn't display properly, but the first link should only cost you around 350 GBP if you build it yourself.

In fact, I just built it in PC Part Picker for 319.15 GBP. They're choosing decent parts for the price, but not the best for around that price. At higher price points, you get a lot more for your money. When looking at identical parts, you can get the same parts much cheaper if you shop around.

The first link's case, psu, ram, CPU, and motherboard are all fine. I would improve the GPU from a 7770 to a 7790 for 10 USD more (6.12 GBP), or the 7850 for 20 USD more than the 7770 (12.24 GBP). Consider hitting ebay, because a lot of the 7xxx series have been sold in barely used condition by people buying the R9 series, not realizing that the R9s are mostly just rebranded 7xxx GPUs.

As many others have said, a self-build is the best option. All the components you buy will have a warranty if things go knockers skyward, and there really isn't much to it. There are countless websites and youtube videos which will help walk you through the process!

building your own is easy. only thing you need to watch for is static

Which one are you gonna buy me?

There are a lot of sites which specialize in putting together a PC depending on your budget and making sure that all the parts are compatible. They can even assemble the PC for you, in exchange of a small fee.

There are no downsides in building your own PC, because it's way cheaper and you get a warranty for each component, not for the system as a whole. So, if you decide to change/upgrade something in the near future, you don't have to worry about the fact that you can't open your PC case to do so. ( since warranty formulars cleary state that you opening the case will invalidate the warranty.

Build your own, that will I also say, you will save some money and get a good PC. If you ask me I will say get a 3rd Gen Core i5 3470 processor; 8 GB ram ; Asus or Gigabyte motherboard and GTX 660 or 760 depends on your budget... I have the same configuration but with lower GPU 550Ti and able to play BF4, COD Ghost, with high settings (My video resolution is low 720p). With 660 or 760 you will definitely get better output.