What gaming PC should I buy?

Before anyone says to build my own, that's not going to happen so I would highly appreciate it if you could link me to some, my budget is around €750/$1000.

I've been looking at Ironside's computers, specificity at this one:

http://www.ironsidecomputers.com/index.php?main_page=product_info&cPath=28223_28242&products_id=310

after all customisations it adds up to $1,015 including shipping. (I removed windows operation system, included Wi-Fi adapter 150 mb/s, added keyboard + mouse and added internal lighting.
Is it worth the price? I have no idea about the specs and thats why i'm hoping someone could help me out.

The reason i removed the operating system is because its $80 dollars less and ill know how to install it myself.

What do i play?
On my laptop the only thing i play is minecraft as its the only game my laptop can handle
(and with that it doesn't handle very well:/)
i'm a major console gamer which i normally play mainly call of duty and grand theft auto so if it can handle these games that would be great, i'm not really into battlefield as it just feels to slow paced for me.
(Yes i'm aware that GTA V is currently not on PC. )

Is there a better one i could go for with similar price? Or slightly less specs but huge price difference?
The most I want to spend is €750 but i'm hoping i can still get a good gaming pc for maybe €600 - 650?

I live in Ireland so if the website ships to Europe/Ireland that would be helpful as alot of Gaming PCs that I find are US based only.

Added (1). EDIT: I also need to get a moniter so the cheaper the better, i also came across a few more PCs to choose from:
http://ebay.eu/1kQcJ6g
http://ebay.eu/1pi6M1v
Again I don't really know too much about specs so as much information would be helpful.

Alienware