*edit* question updated further down in post #6, to bring it inline with the new adapters. Still waiting for the supposed new iMacs, but I'm not sure how much longer I can wait. Whether I buy now, or later, I can't decide on display adapter. The 24" iMac has the option of : Nvidia GeForce 8800 GS http://www.nvidia.com/page/geforce8.html or ATI Radeon HD 2400 XT http://ati.amd.com/products/mobilityradeonhd2400xt/specs.html I will be gaming on the Mac, can anyone tell me which is 'best' - I'm a programmer and not an expert on hardware The HD bit of the ATI sounds appealing - but I think people rate nvidia GPUs more?? Thanks.