Ok, I think I settled on a mobo / enclosure. Unfortunately, they do not sell this mobo here, but I'm looking at the
Phylon 7F2WE-1G2 with a CF / PCMCIA daughter board, enclosed in a
OPUS Mini-ITX Vehicle Case. This will cap me at 1G of RAM, but I
should be able to work around with that.
This will allow me to mount both a PCI video card of some sort, as well as a PCI wireless card with antennae hookup (I refuse to go wireless via USB).
As far as flash vs. hard drive, I think I'll still go flash.
I think I'm going to order parts today - if nobody saw anything other than the hard drives as a "screwy" setup, I think I'm set.