Another possibility is Science on a Sphere (projected on the sphere rather than an active display):
I see they have one in at the McWane Science Center in Birmingham, AL -- perhaps a few hours away, by car, from you in Huntsville.
You might need a slightly bigger office to fit this one but, the globe that you want is hanging in the Tokyo Science museum: http://tokyotek.com/geo-cosmos-gigantic-globe-oled-display-video/
Watching realtime weather patterns on it and day and night images is pretty cool.
On the perhaps slightly positive side, there is a Science on a Sphere system at McWane Science Center in Birmingham, Alabama (http://www.mcwane.org/ ). This might be sufficiently close to you that you could go and see what future generations might have in a smaller and less expensive form.
Also, my pessimistic view need not correspond to reality.
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