I know 300 dollars for a bump from C2D/4670 to a i5/4850 is easily one of the best upgrades Apple has offered in a long, long time.... but would I really need it? I was primarily going to be using the iMac for everyday stuff (word/browsing/etc) and for games occasionally by others. I don't need everything running on ultra with AA on or anything, just visually comparable to PS3/X360. I will be doing a lot of Photoshop/illustrator things as well and might get into video editing. I was thinking maybe I could hold out on going quad core for a couple years until Macbook Pro lines get it at a reasonable price then I can just use the iMac as a gorgeous led and media hub in the background as I do my work on the Macbook Pro. I've seen the benchmarks, but how does it work out in real world situations? What would having Quad cores do for me except help me handle files/render a few seconds faster here and there? I'm sure it's a tremendous boost in things like encoding but how would it help when it comes to image editing? Is the 4850 a huge bump in specs compared to the 4670? Is the performance gap similar to going from 9400 to the 9600? Any inputs would be greatly appreciated. Thank you.