Sorry to say I am 99% certain Newegg don't deliver outside the states.
£500 is a good price to pay for the bits but don't forget the OS cost.
Western Digital do excellant HDs and Sony good DVD/CD RWs. Crucial are great for memory (life time Garn'te)Make sure you get a top quality PSU (not cheap)it is the life blood of the system.
Have a look at overclockers.co.uk