Hi all, Planning on upgrading my 2007 iMac very soon and debating which 27" model to get. Core use will be aperture and some light video editing. I'm not a massive gamer but might try out a few now I've got a machine thats capable, probably mainly RTS games. I think I've rulled out the 780m as I'm not a hardcore gamer, any thoughts on the 1gig vs 2gig? The only other upgrade I'm planning on is a 1TB fusion and then upgrade the ram separately Cheers.