Hi, I have decided on purchasing a MBA with 8GB of memory and 256 GB SSD. With that said, I am hoping to get some advice on the processor. My main use of the computer will be: - Photo and Video storage and editing - Multiple programs open at the same time - Streaming to Apple TV - Average downloading and streaming I know the i7 is about 15% faster but is that 15% truly noticeable? I do plan on having this computer for about 4 years. Thanks in advance!