If you’re a compulsive modder, Microsoft’s Sidewinder X6 ($79.99) may be the keyboard of your dreams. Illuminated, the legends on the key caps glow in orange. Unlike the Logitech illuminated keyboard, however, most of the light comes from the space between the keys; the keys seem to float over a red pool of volcanic lava. Nearly every control on the keyboard is backlit, though the choices of what didn’t get backlighting seem odd. The two large, round knobs at the top r