I'll second the Surface Pro 2 - with at least 256GB SSD - that way you get 8GB of RAM.
I just started using it with my Phase One/Cambo setup, and it works great. Note that it's got a USB 3 port which is important if the camera supports it. Mine does. Even 60mp files tether to Capture One in ~2-3 seconds. That's extremely useful for checking composition and focus.
That´s what they call progress, I guess. Checking composition and focus on the ground glass is way too simple. Great that, finally, Phase One came up with a cool solution to overcome this old problem.
