Just wanted to point out that the retail stores sell only exactly three models of the RMBP, the base 2.3GHz/8GB/256GB version, the high end 2.6GHz/8GB/512GB version, and an ultimate (close to $4k) 2.7GHz/16GB/768GB version. They don't sell any RAM upgrades. This means they consider 8GB RAM sufficient for most Pro users. Interesting, huh? When I asked the guy in the store told me that they don't consider RAM important anymore with these fast SSD's, since swapping is almost as fast as memory. Whether he's right or not, the fact that they don't put a RAM but an SSD upgrade in their higher end version in the stores can't be random.