Thank you all for the suggestions, much obliged. I haven't decided yet.
At the moment, I'm extremely frustrated by the lack of appropriate terrain. Really, the current selection of science fiction terrain in 28mm is -shockingly- bad, and I don't really have the skill/time/desire to build it myself. Unfortunate, as it could really take the wind out of any potential project. Wish I'd known about how bad things were before I ordered so many miniatures!
*sigh*
-Doc