The Cube for me. It was the first Mac I owned. When I was thinking about switching from the PC world, back in 2003, I picked the Cube as my starter/try-out machine, figuring it would have good resale value. I loved it, and did every upgrade you could to it. I finally sold that one 🙁 so that I could buy a Powermac G5, but I regretted the Cube so much that I've bought three more since then, two of which I've resold. This one, I'm keeping for good, and it still soldiers on, reliably, silently, and beautifully, more than ten years after it left the factory. 😀