I'm looking at getting a new iMac - the 27" with the upgraded processor (i7 3.4GHz). I see I can also bump up the graphics card to one with more memory (Nvidia GeForce GTX 680MX with 2GB of GDDR5 memory) and RAM can go to 32GB.
What I wan to know is, how are the current gen of iMacs for After Effects, and which of these upgrades will AE make the most of? Processor is always good, and the i7 will do hyperthreading (does that help in AE?). What will 32GB of RAM do for it, and will the GeForce with 2GB help? Can it offload any processing to the graphics chip?