I currently have the Rev. A MBA with the RunCore 128 G SSD. The machine is about two years old and runs fairly well except for running Aperture 3 and iPhoto. The one USB port is very limiting. I am thinking of upgrading to the new MBAs and am having a hard time figuring out the ultimate setup. I am afraid the maxed out new 13" (256 G, 4 G) might not be too much of a upgrade over my present machine. I am tempted by a two-machine setup with an iMac and the 11" MBA (128 G, 4 G) where I will put all my media on the iMac and run CPU-intense task on it and use the 11" for writing, surfing, video viewing and making presentations on the road. So, the simple question: one machine or two? Thanks.