Thanks! We're still trying to figure out a rule set. I've had the Bolt Action modern variant and Force on Force recommended by several people online; since my gaming group already plays a lot of BA WW2, we'll probably try that variant first and see how it goes. I'm also trying to meet up with someone to learn Spectre, so we'll see if that works at all (I've heard it's best for small actions with only a few figures per side rather than what we're planning).
Chris