I currenty have an iMac G5 3rd Gen. Work with Aperture, Photoshop. Shoot RAW images. Also do some home-video editing, and slideshows for DVD. Aperture runs fine in m partner's iMac 17" Intel, but barely opens in mine - let alone work fine. I'm thinking of upgrading, but not sure how much better for the kind of stuff I do is the 24" with NVIDIA GeForce 8800 GS con 512 MB, compared to the 24" with Radeon HD 2600 PRO de ATI con 256 MB Would appreciate any advice / opinions!!