Rugged, Reliable, Low Power Linux Hardware?

Jesper asks: "OK, so I'm about to spend two years on a sailboat. The GUIs of all commercially available instrumentation electronics are ugly and outdated at best. But to develop my own I need a Linux based system that runs on 12V, uses very little power (preferably &lt 25W including monitor), has a sunlight readable waterproof SVGA display with min 16 colors and a waterproof input device (mouse, trackball or touchscreen. Keyboard not needed), and a rugged CPU with minimum footprint, preferably with a solid state harddrive. All this is perfectly possible to build, but I want to spend my energy developing the GUI, not building the hardware. I'm looking for tips on available H/W products."