I was looking at the following imacs: http://store.apple.com/us/product/FC511LL/A?mco=MTkwMzU2MjI and http://store.apple.com/us/product/G0GF0LL/A?mco=MTU0MzQ1NjE Seems like the only difference is the gpu and cpu. I do a lot of photo work and minor video editing. I also game from time to time. I've heard some new features were added on the new imac refreshes as well. If anyone could elaborate on said features I would really appreciate it. Thank you.