I am planning on buying a new powerbook after Tiger comes out (I presume it will be realeased at the WWDC this June). I have been doing some research to find which model will suit me best. I have decided to go with the 17" model, mostly because it as the digital I/O for audio (I will be using the machine as the basis for my portable audio studio). My only concern is that the larger screen size will cause slower video performance. In addition to using it for audio I will probably run Motion and a few games on it. I am aware a laptop does not provide for the best gaming platform but I am by no means a hardcore gamer. I just game every once in a while. Will the bigger screen cause the GPU to run slower than the 15" model with the 128MB of VRAM?