My first PC need help!

[Mart_C_2410]

So I currently have an Acer aspire 5732 Z laptop which won't play any of my games except Team Fortress 2 and Minecraft (incredibly slowly). I am looking at getting my first desktop gaming PC and am wondering what is the best I can get for around £650. I would like an Intel core i5 processor or AMD FX 8350 quad core, 600W power supply and 1GB or 2GB graphics card but apart from that I am not fussed (unless there is better products for cheaper money ) and 8 or 6 gb of ram. The games I am looking to play are Arma 2, Black ops II, CoD: WaW, Counter Strike source and probably Cs go.

 

[Mart_C_2410]

Thanks, i'll probably go with the 500W ps, and i'll probably spend the extra on a different case (Coolermaster Silencio 550) and a dvd drive is there somewhere/one that will put it together? I was kind of looking for a prebuilt