Do you walk long distances? Like miles every day schlepping around gear? I doubt it. Is that whopping 1.5 pounds difference really going to break your poor arms and back? Your willing to buy a laptop gimped with only one port but your concerned about HD space? Id assume you do everything in the cloud if you are willing to deal with only one port, HD space shouldn't really matter. Colors? lol. Sounds like you want a toy rather than a productive machine for work. Get the rMB then.
I'm buying the toy too. Also, I bike 10mi to work each way, fatty. Also, I travel internationally several times a year. I have a more powerful machine at work and home, but for traveling I want the lightest machine possible in which I can still get some writing, note-taking, on the fly data analysis, presentation work, and web browsing.
I could buy a 13" MBA which is lighter, but I don't really need the processing power for what I want to do and I like the retina screen and smaller footprint.
Don't be such a snob... He's not reaching into your pocket to buy the computer.