This last image shows a mockup with a simple stand. I would suggest making the stand out of clear plates/bricks, for visual impact and to further highlight the globe by creating a floating effect. Also shown is the recent Naboo globe with a stand, to give a better feel for the intended final result.
To summarize, this model showcases a universally recognized subject, highlights an advanced-but-straightforward building technique, is reasonably priced, and has universal appeal as a display piece, educational tool, and sculpture.
*** If you've read this far, please consider voting to see it produced! Thanks! ***
PS: If you like spheres made out of LEGO, check out my latest CUUSOO project at http://lego.cuusoo.com/ideas/view/16974
, a Star Wars Death Star II wall/desk clock sculpture!