I've been around these forums for a while now. So I feel like I can say this around here. That said, I'm not a public speaker. I don't represent anyone but myself. It feels a bit awkward to post this way. But I do deal with the public for a living and have been for years. There are some things...
Get the Air. You would know if you needed more processing power. And I doubt many people actually need anything more than what these new machines offer.
My wife has one and she loves it. Bought it just after it released. It's the upgraded 8Core CPU/GPU, 16GB RAM, 1TB SSD. It's silent, fast...
Another (IMO overpriced) collectors car that'll spend it's whole life parked behind a rope. Never to be enjoyed. I'm probably just being grumpy, but I just don't get excited anymore by high dollar cars that just sit in collections.