The new Mac Pro has an innovative design by many standards. Though it may push the envelope with its tube-shaped design, it's not the only Mac tower that has a striking appearance. Previous Mac desktop towers had a look of their own that set them apart from the boring beige plastic of most comparable PCs. You can check out a gallery of these Mac beauties over at Macworld in its "Towers of Power" slideshow.A gallery of Apple's tower computers originally appeared on