I searched around the forums for relevant threads, but I couldn't find one with the specific info I'm looking for. As the title says, I am stuck in the constant struggle between power and portability. I am about to buy a Mac and I am not sure of what to choose. I am a motion graphics designer and I need to work with lots of video. For that reason, I think I would pick an iMac 27", however, I would like to buy a MBP 17" so I can take it to work meetings or lay down in my bed and check my email (or play SC2 :3 ). MBPs 17" have 2.53GHz Intel Core i5 and iMacs 27" have 2.8GHz Quad-Core Intel Core i5. I would buy any of them with 8GB and an upgraded processor. I want to know about the processors, if there's a slight or huge difference between them, i.e., I can perceive a reduction in the amount of time on different processes. I hope I made myself clear and you can help me to know which computer will give me the best value for my money. Essentially, when it comes down to which one will last longer. Thank you, guys!