I am planning to buy a MBP 15" but can't decide between the 2.53 and 2.66. Apart from internet, downloading etc. I expect to use it often for photoshop and lightroom. I travel a lot and shoot a lot of pictures in raw. I have been talking to 2 different Mac sales persons and the first one advised me to go for the 2.66. He said that the 2.53 videocard is not good enough for the photo's. He also advised me to go for the 7200 rpm because of the quicker performance. Later I spoke with another person and he told me that 2.53 is sufficient enough. The extra graphic card is according to him only necessary for video editing, playing games, 3D design etc. Besides that 5400 rpm would also be fast enough for what I want to do. After hearing two different opinions I got confused. Is the graphic card in the 2.53 good enough for my photoshop editing? Is the 2.53 processor and the 5400 rpm fast enough for my work? I am also afraid that the 7200 rpm will make more noise, will overheat the system and that it will drain the battery faster (as well as the 9600 graphic card). And a last question: since I am travelling a lot I would prefer to go for the 13". Especially since I am also carrying a lot of camera stuff. Will the 13" screen be good enough for using photoshop? Hope you can help me out with this. Thank you in advance for taking time answering my questions!