All was fine till I read XP. The machines I first thought of no longer issue XP drivers so that's toast.
I am a researcher working on mobile navigation. I need the smallest possible and most powerful laptop there is with SSD hard drive (size doesn't matter). It just needs to be very resistant to shaking.
It should have at least 3-4 USB ports so I can hook my sensors to it. I don't care for graphics, sound, I just need it for computing. I don't even need the screen, I would connect an external screen through the VGA cable. I would install Windows XP on it.
Price doesn't matter.