I will soon be getting the base 27" iMac when it is available in December. I will also be upgrading to either 12 or 16 GB of ram. having said that, i will be using my mac for adobe photoshop, illustrator, indesign, dreamweaver, fireworks, and some other flash based products from adobe. along with all this media work, i will also be using my mac for general web browsing, social networking, school work (undergrad and medschool). based on what i will use my mac for, how future is the base 27" model? should i upgrade the HDD or just buy an external drive (1-3TB) and store the important stuff there? also, the ODD is of no importance to me. car has stereo which has the aux cable thingy... and i dont watch movies on my computer (renting from itunes is a diff story), i dont produce DVDs for projects, post them online...