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Screen resolution is one of the most important usability factors for a notebook, but manufacturers sometimes skimp on this to keep the cost down. We like screens that are over 800 pixels tall, although clearly trade-offs must be made with netbooks and ultraportables. We also prefer 'wide-screen' resolutions (wider than the 'standard' 4:3 aspect ratio) that allow you to open two document windows side by side. If high resolution is a top priority, look for 15.4in. displays or bigger with resolutions of 1,440 by 900 (WXGA+), 1,680 by 1,050 (WSXGA+, pictured above) or even 1,920 by 1,200 (WUXGA).