Hello.
New iMac will have:
21.5″ / 3.2GHz Core i5 / 4GB / 750GB / ATI Radeon HD 5630 512MB $1199
21.5″ / 3.6GHz Core i5 / 4GB / 1.5TB / ATI Radeon HD 5850 1GB $1499
27″ / 2.8GHz Quad-Core Core i5 / 4GB / 1.5TB / ATI Radeon HD 5850 1GB $1699
27″ / 3.3GHz Quad-Core Core i5 / 8GB / 1.5TB / ATI Radeon HD 6850 1GB $1999

iMac will be strong device 
soruce: http://www.mojipod.sk/
New iMac will have:
21.5″ / 3.2GHz Core i5 / 4GB / 750GB / ATI Radeon HD 5630 512MB $1199
21.5″ / 3.6GHz Core i5 / 4GB / 1.5TB / ATI Radeon HD 5850 1GB $1499
27″ / 2.8GHz Quad-Core Core i5 / 4GB / 1.5TB / ATI Radeon HD 5850 1GB $1699
27″ / 3.3GHz Quad-Core Core i5 / 8GB / 1.5TB / ATI Radeon HD 6850 1GB $1999

soruce: http://www.mojipod.sk/