I'm new to the whole processor arena and understanding it. So first off, what will be the big difference between having a solo or a duo in means of speed. Also is it going to be possible to compare Mac processor speeds with PC processor speeds? But if you're looking for pumped up laptop then go for the macbook pro line,but leave the ibook line as a low voltage processor notebook. I'm a college student and I've had my iBook for three years now and love it, and I assume that is a huge market for those who are looking for an entry level notebook or an introductory Apple notebook.