The Precision 7xxx series are recommended if weight is no object and you need a beast of a laptop to crunch through video editing, signal processing, or Crysis. The fact that it comes with Ubuntu is a boon to top-end mobile Linuxing. A vast improvement over the M3800, which is a capable machine in a frustrating enclosure that doesn't even come with the basics like Ethernet, and doesn't supply a docking port.