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I have spent months looking into a new laptop. It's primary use will be editing and developing photos in Lightroom but I will also be putting together photo and video slideshows in Premier Elements and maybe even premier pro in the near future. What I cant decide is what is more important; dedicated graphics card like the higher end Surface Book or more processing power like in the Dell Xps with Core i7 and 16GB of RAM. Can anyone give me a definitive answer. My budget is up to £1600 - I think.