PC illuminate

If you want to be more efficient and do a lot of mulitasking, Pc illuminate might have what your looking for. Pc illuminate offers dual, triple, quad, and 5 display formats.
With four 21 inch monitors it will allow over 8 megapixel resolution for dragging spreadsheets, photos, websites, email, etc across 4 displays each at 1920 x 1080 resolution each rather than just scaled across.