I need two laptops... one for database development while tethered to an external display and one for travel (size, weight, and battery life matter here). One other thing to keep in mind is that I will actually take both when I travel. The more powerful might be needed in the hotel at night. I'm thinking that the following might be the best combination. The powerful one is easy... rMBP 13 or 15 But the 2nd one is not so easy. It has to run a couple of very important applications: VMWare (for Windows use) Filemaker XOJO (database development tool) With the recent introduction of the MB 12" this sort of clouds the issue. Before that I was thinking that the MBA 13" would be the best option. Perhaps it still is? But then, I don't really want to invest $ 1500 or more in an obsolete computer. Even the first option of 13 or 15" needs some consideration because I will need to take it on the road too. I know the 15" is more powerful with the quad core CPU, but will it make that much difference? Should I wait for WWDC with the rumors of a refresh to the 15"? What's your thoughts?