Looking to purchase a new desktop as a central photo, music, video hub, generally for the home. Currently own a 2007 or so 15" Macbook pro as the home machine and travel with a year old macbook air. Was pricing out the basic iMac, when i realized that for $300 more, I can get a 13" macbook pro (non retina) with a faster processor 2.9GHz Dual-core Intel Core i7, versus 2.7GHz Quad-core Intel Core i5, in the iMac. Hard drives would be the same, 1TB Serial ATA Drive @ 5400 rpm, and while the imac has better graphics card, I can't see a big difference. So help me out, what am I missing?