I've been a Mac user from day 1, and can't really imagine using anything else. However. For my business, I need a capable, expandable desktop computer, mainly for Photoshop and some 3D modeling . Some laptops , too, but only for travel; iMacs are not an option . In the past few years, Mac Pros have become less and less compatible with existing peripherals, namely USB 3 drives and regular display port standards, while Thunderbolt is still a big unknown . Also, the upcoming Lion OS , along with all the efforts Apple makes to push consumer devices only, makes me wonder if the company will be providing proper workstations any longer within the next few years . I'd really hate to do it, but rather jump ship now, get used to another OS and invest in compatible peripherals, than being forced to do so when there absolutely is no choice .