People keep telling me to get a GTX780 over a GTX770 because it is more "futureproof", I watched a linus tech tips video showing that the only futureproof parts on the pc are the case, the harddrive and a few other things. Is this correct because if I spend £134 extra on a gtx780 for 30% better performance then I will have to cut down on some of the other parts on my build.