Apple’s New iMacs Add Thunderbolt, More Graphics Muscle, and Monster Quad-Core

2 versions 

21.5 inch

• 21.5-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors
• Resolution: 1920 by 1080 pixels

27 inch

• 27-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors
• Resolution: 2560 by 1440 pixels

Processor 

2.5GHz quad-core Intel Core i5 to 3.1 GHz quad-core Intel Core i5

Memory4GB (two 2GB) of 1333MHz DDR3 memory

HD

500 gb to 1.000 gb

Extra's

• face time HD camera
• One Thunderbolt port on 21.5-inch iMac
• Two Thunderbolt ports on 27-inch iMac
• SDXC card slot up to 64 gb

Price

from $1199 to $1999

source: http://www.apple.com/imac/specs.html