I'm going to be starting at my college in september to study graphic design. I am planning on either getting the 20" or 24" iMac, however here is the problem. Is the 2.8 extreme processor going to be that much faster than the 2.4 in the 20"? I already have an external monitor that I plan on using photoshop in anyways so the screen size doesn't matter that much I just wonder if the 400 mhz is worth the extra $500. I already plan on getting 4gb of memory so the extra $500 would really help out especially since I need to get CS3 but with the buy a mac and photoshop deal they have going it doesn't seem like a real big deal. I can go up to $2400 which is enough for a mac pro however I find it to be overkill since I'm not gonna be doing video editing work aside from maybe sometime down the road with just sd video. Not to mention I play video games in my spare time now alot since my gf has moved over an hour away for her college. So buying a video card for my pos windows computer seems smarter than getting one of the crappy graphics cards they have in the mac pros. Any help would be amazing, thank you.