Dan, I dont know if this is of any relevance to you, but I had this thought since I,ve been looking for a case for a friend and stumbled over the A4.
Have you considered Club Live VJs as a target group for promotion? Your case is JUST PERFECT for many of them. They do realtime 3D/2D rendering in reaction to the Audiostreams and literally cant get enough 3D horse power. To make it look better, you just throw a couple of thousand polygons in and you can easily ask too much of any laptop there is. Nice thing is also its a growing field, many nerds.
They need their own PC and cant relay on the clubs equipment, because software is just too individual. So it needs to be mobile.
Cooling has to be very good (hot clubs), but noise of the fans isnt an issue.
I dont really know how or if promotion works in your case. :-) but this might be interesting to look in.