Update...
Bought this:
Configure - Apple Store (Canada)
It has already won me over. Mac 4 Life.
Seriously though, it's fast as fuck.
Boots in less than 15s.
Retina screen is sick.
I'm sold on the concept of trackpad gestures, especially for surfing the web.
Seamless integration with my iPhone / iCloud is really convenient.
Happy with the purchase.