I'm a photographer and looking to upgrade from my Macbook Pro to a 27" imac. I do quite a bit of photo editing and the macbook pro (2.66 core 2 duo w/ 4GB ram) isn't able to keep up. Besides the photo softwares, I like to have a few other apps open while working and they can use a lot of "real ram" -- like Safari will use up to 1.5GB (i use ClicktoFlash but often force quite Flash). Then other apps will take up more space like Pages @ ~50MB, iTunes @ ~40MB, iCal @ 20MB, Preview @ 60MB, etc etc For photos, Photoshop alone can take up between 1-2GB. So when I use Lightroom 3 (which is a real hog), having it open plus Photoshop is out of the question. And now, I'm slowing getting into video so Final Cut with it's supporting softwares will def. require more performance. FYI - I wouldn't simultaneously run the photo and video software. So which 27" iMac would best suit me? I'm thinking the i7 2.93 Quad with either 8GB or 16GB ram. Would the 2.93 really make a difference from the 2.8? Do i need the 16GB ram? What else should i be looking at besides memory? cheers!