I currently have a late 2010 13" MacBook Air (4GB/251GB/2.13GHz) that I am thinking about replacing with a BTO 512GB rMB with the 1.3GHz option. I was playing with a rMB at my local apple store and tried to stress the machine by playing a 4K video while editing photos in photos and couldn't get it to get hot after about 20 minutes of use (my current Air would have had the fan come on if I did the same thing) or have any lag in photo editing or video playback. I know that not too many people have have received their BTO rMb's but I'm trying to figure out if a rMB would be ok for me and would be "future proof" for about 5 years. I would mostly use it mostly for web browsing, HD video playback, Light video and photo editing, remote desktop work, and creating and editing large spreadsheets and word documents (work again). Can someone tell me when their 1.3 rNB stumbles so I can choose between a maxed out 13" Air or a 1.3 rMB.... Thanks!