I'm new to this, so please tell me if you realise any of these parts aren't compatible or if there's a better part for the money. Through amazon, all this would cost me around £520. I realise £520 may not be a lot of money, but i'm 18 and currently have no job, as soon as i get one the money will be going on a PC.
Hey, overall it looks good and I suppose you're going to overclock that CPU since you got a cooler, it becomes the best bang for buck CPU when overclocked. You can get it slightly cheaper here though: http://www.overclockers.co.uk/showproduct.php?prodid=CP-253-AM
You should try to add another 20 pounds and get a HD 6870: http://www.amazon.co.uk/XFX-Radeon-HD-687A-ZHFC-Graphics-Memory/dp/B005C31F2M/ref=sr_1_5?ie=UTF8&qid=1352587785&sr=8-5
It's alot faster than the 7770 and will run any modern game fine. It would really really be worth the extra cash. Just skip one pub evening and you got it ;)
You look like you have done your homework on your hardware. Overall it looks good but I agree with Spitis about the GPU. Well worth the wait even though one might suspect you are just dancing about getting your system. The wait will be well worth it.