So I am going to have an unsatisfactory answer, but maybe its helpful: 1. Performance was kind of a reason for the Air. I want a machine that gives me the pers

So I am going to have an unsatisfactory answer, but maybe its helpful: 1. Performance was kind of a reason for the Air. I want a machine that gives me the perspective my users will have when using my software. 2. But doesn't that suck for actually building? Yes except... I also just have a nice computer on the network that I offload the actual rough tasks to. This might end up being a good solution for you too. 3. This might also future-proof you for the ARM switch. If you have a good build computer, and a cheap "interface" computer, you can switch to a new ARM computer in a bit with little pain: none of the the "real" stuff has to change. It kinda sucks for multi-monitor though. It really struggles with it.