
Personally I would take an AMD/ATI or AMD/Intel just for the use of raptr since I love it.
Also NEVER buy prebuilts as they will fuck you over later on when you want to upgrade. A few great websites for building is PCBuilder https://ca.pcpartpicker.com/ or others as they will only let you put compatible parts into the build you are making which helps a lot when you don't know what you are doing.