How about a basic briefcase, maybe leather like in the image attached, that you'd commonly see executives carrying. Pop the locks and the computer would swing into action, maybe including a switch so opening the case turns on the computer.
The basic components would include:
32GB SSD for the OS and some programs ($85)
2.5" backup HDD for the other information ($65)
LG Black 6X SATA Blu-ray Burner/HD DVD-ROM Drive Model GGW-H20L ($160)
4GB of RAM ($43)
Logitech G15 Keyboard ($74)
Staples Solo Leather Briefcase ($60) [web]http://www.staples.com/office/supplies/p4_Solo-Leather-Expandable-Laptop-Briefcase-Burgundy_103219_Business_Supplies_0_10051_SC1:CG20 :CL120500[/web]
This would leave a few extra dollars for misc expenses, but would provide a real eye-catcher for the bleeding-edge executive to travel in style without sacrificing appearance.