I'll be traveling to Europe for a month, and I expect to take lots and lots of photos. I would like to take a computer to back up the SD card, and have internet access, email, etc. I haven't gone more than a few days without a computer since the 90's so I am hesitant go with just an iPad/iPhone or just an iPhone. The 11" lacks an SD card slot, no big deal, but it's maybe too tiny for me. The 13" may be too big for the hotel safe, though. I will be on a bus for a few hours here and there, so being able to watch a movie would be nice. Any thoughts, ideas? Perhaps, keep a 13" in my suitcase and lock it to the furniture? My 15" MBP is too big, expensive, heavy to take. Thanks!