Poll results as of Thursday morning, 11:30est:

Seems like the consensus so far is to have the three towers on one base...with some breathing room between them, even if it means a) making them smaller on a conventional-size base, or b) making them "regular" size but on a larger-than-average base.

Of course, the sculpture is already finalized and likely being produced in China now. If someone will kick in for my airfare and accommodations, I'll investigate and bring back some secret photos. "Shoe Leather Harnsberger," that's what they call me...