gussrtk :
What is your budget?
You are gamer? 〓 scale 1 not very and 10 intense? 〓 which games?
Overclocking?
Less than £700
Not too intense, around 7/8. Games, nothing as demanding as Crysis 2.
Overclocking if I need/want to.
DarkSable :
If you aren't a gamer, you don't really need a video card that low-end; if you are a gamer, with a low budget, you're spending WAY too much money on the CPU and way too little on the graphics card.
(You also want an i5-3570k instead of a -2500k, especially seeing as how you've got a z77 mobo there. A 2500k is older tech that won't make use of the tricks up the sleeve of that motherboard.)
Also... no ram?
Ivy Bridge is more expensive than Sandy, only by £4 but
The GPU is temporary, maybe for a year or so, as long as it can get around 30fps, it's fine for now.
RAM: Corsair Vengeance 8GB (2x4gb) DDR3
Thanks for the other replies guys, just a disclaimer, this is my first pc that's custom, so I'll have nothing to compare and contrast against apart from a Pentium laptop. To an experienced PC gamer/builder etc, the rig may seem lower-end and stupidly bought, but I'm only to upgrade my parts. So, bearing that in mind, this rig is okay, right?