My theory on having multiple computers is that they should be very different from one another, otherwise it is kind of a waste. If I had two macs or two pc's sitting side by side, I would always end up just using the better one. Here is my scheme on having both a desktop and a notebook. Pick which platform you use to actually get your work done. That one should be the notebook, and the more powerful of the two. Therefor the desktop would be just for the heck of it, so that would be the slower one, and of the other platform. I have always been a PC user (and have to use one for school), so I have a nice PC laptop. I find macs neat, so i got a powermac g4 from a surplus auction. Two computers, no redundancy.