Looking to upgrade my p4 2.8gz machine and I was wondering if this is good value for money..?

well i'm in the US and no idea on how pounds converts but i would say yeah thats a very solid machine and if its got a good mobo you will be able to overclock your CPU to 3 Ghz without any real risk. 4 Ghz if you want to up the cooling and really push it but doubt the mobo can handle that