x86 car pc project?

Need input on an x86 computer that is going into a car.

I want to have a main touch screen in the front dash, but would also like to output to four monitors in the back. The motherboard I am using has built in Intel Graphics. I don't plan on gaming in the car, but maybe I can run some very basic emulators.

 

Thanks, it's going to be a relatively beefy system.
Specs:

Intel DG41TY motherboard lga775

2x2gb ddr2 800mhz

Intel 120gb ssd

Intel E5430 - 2.66ghz quad-core processor 12mb cache

 

If you had to choose an OS for a x86 carputer, which would you choose?

XBMC under Windows 7

XBMC under OPENELEC

Android for X86? (this seems like a really fluid OS, but not sure how far the project is)

Windows 8.1 or wait for 10?