Apple updated the entire line of iMacs and added options to the top end.
All come with 1066 MHz frontside bus, 6 MB shared L2 cache, memory 800 MHz DDR2 SDRAM, up to 4 GB; Mini-DVI output port, FireWire 400 and FireWire 800 ports, 5 USB 2.0 ports; built-in Airpot Extreme, Bluetooth and gigabit ethernet.
First up, a 20-inch, 2.4GHz, includes 1GB of RAM and Radeon HD 2400 XT graphics for $1199.
Next, 20-inch, 2.66GHz model with 2GB of memory and Radeon HD 2600 Pro graphics at $1499.
Top of line, 24-inch, 2.8GHz $1799, Radeon HD 2600 Pro graphics, but it is upgradable to a 3.06GHz and NVIDIA GeForce 8800 GS graphics (with 512MB of video memory) for $400 more, totaling $2199.