Which one will depreciate more in 1-2 years, the base 13" MBA, or the mid 13" rMBP? I found a base open box 13" MBA locally for sale for $877 after tax ($1099 model), and a 13" mid rMBP for $1350 ($1499 model). Which one will I loose more money on? I'm guessing the rMBP even though it is newer just because it is more expensive to begin with. Thoughts?