Apple is excellent at offering new models that make worthy upgrades. Their latest iMac desktop computer is no exception. Its performance is better than the old iMac: a dual-core Intel i3 processor and 4GB of memory are now standard. The screen is better: 78% more pixels render HD quality images. And the extras now include a Magic Mouse and an LED backlit keyboard. The only part of the new Apple iMac that isn’t more: the price.