My argument is that you can not find a laptop with a nicer screen and keyboard, with good battery life, durable case, light frame, and amazingly fast HD for less money then an rMBP would cost you. And given that's its only $12/week, why not choose the best tool for the job, especially if your job is working on your laptop.

Of course, same arguments can be applied to almost anything, but this thread was about premium laptops. You can't have a premium laptop that's also very cheep.