If you look closely at the "New" Retina configuration, it looks like the lower end old iMac with a new display and TB2. It still comes with a 1TB hard disk as standard. The New iMac has fewer upgrades so you can choose either the lowest costing 27" iMac at $1799 or start adding options and go all the way up to $3768 (list, all options including AppleCare). This is a nice range and should allow potential buyers the ability to find something in their price point.
5/19/15 at 7:13am