i couldn't decide what the best spec to go for, we spec'd the system as a base, in that in the future you would be able to add the 2nd gpu and maybe an SSD. We haven't included a optical drive as id probably stick the one out of the old machine into it until games need blueray and then buy a blueray drive?
Comments to the above system, needs a 2nd GPU, get rid of norton and if you have the cash splash for the i7, although there isnt much thats going to be using it now in the future you will be better off with an i7 than an i5.
My system came to £945.00
i did do this at 4am so my apologies!