First post from a probable switcher, been lurking around here since about January. I am trying to decide between a MB or MBP. One factor is the screen size. This will be my only computer, and I don't think I could go with a MB unless I have a larger display to go with it. I have read in a couple of threads that the MB sometimes has a hard time driving the external display, as there is sometimes some stuttering or chopiness. What I am not clear about is whether this only happens when using both displays, or if it also happens in clamshell mode. Thanks in advance for any help.