HI I have been following the forum here, and have read a lot of great advice regarding the new iMacs. I am still unsure whether to go with the 2.8 or 3.06 based on my use. I have read the 3.06 is for gamers which I am not. I am teacher and use videos that I create in the classroom. I take images, student work (drawings, narration) , and video (news, movie, documentary etc) (off Tivo or Internet), DVDs, and create 2 to 20 minutes videos illustrating an idea such as the Industrial Revolution or Great Depression, tying it to current events. So I cut up various source materials and put all back together again. I use programs like Fotomagico, Imovie, Itunes, Keynote, Garageband etc to integrate the images, videos, questions, ideas.I will then export the videos made for either a DVD , Ipod, or for my class website. I currently have an iMac G5 (2nd gen). Since I often use current events i want a quick turnaround, so process / converting videos from DVDs, and then exporting my created movies to a playable format quickly would be valuable. Is there a big processing speed gain between the following two configurations. ? Is it worth the $400 to go with 3.06/Nvidia option? Any suggestions. I plan adding RAM to either. Or is it best to just max out the RAM? Choice 1 2.8GHz Intel Core 2 Duo 320GB hard drive1 ATI Radeon HD 2600 PRO with 256MB memory Choice 2 3.06GHz Intel Core 2 Duo 500 GB hard drive1 NVIDIA GeForce 8800 GS w/512MB GDDR3 thanks for the input.