I have both, MBP and MBW. I upgraded to MBP primarily because I need to use virtualization, so more CPU power was very desirable. But yesterday I got back to my forgotten MBW in order to transfer iDVD that was missing on Mountain Lion. And I have to tell you - once I got MBW out of the drawer in my hands, I realized what a nice piece of design it was... I really enjoyed lighter efforts on the keyboard, less noisy and easier to use track-pad... pretty fast and not overloaded by tons of background processes (not used by me notifications, ..., ... ) Snow Leopard... I really wish I had my MBP's internals in that white body and under Snow Leopard's control. P.S. I believe Mac products are not going to be as refined as before.... Instead of fixing bugs and making software components stable, simple and efficient, Apple developers are pursuing iOS / MAC OS X integration goals, which is never ending story. They fix MAC OS X, but then another team changes iOS, and then the opposite happens. Same on the hardware level - too many device flavors for software to be efficient and with small footprint.