If the Logitech MX900 looked over its shoulder, it might see the Belkin Bluetooth Wireless Optical Mouse grinning back. Both mice have an 800-dpi optical-sensor resolution, providing an accurate and smooth mousing experience. But Belkin designers have constructed a leaner, less complex mouse. With only one additional shortcut button—an easy forward/backward Web navigation clicker—the Belkin mouse is simpler to use but less customizable. On the design side, a cool blue light shines through the scroll wheel, giving updates on battery life and Bluetooth connection status. And the Belkin mouse sells for $20 less than the Logitech MX900.