An IRV system would certainly be interesting (see -> http://en.wikipedia.org/wiki/Instant-runoff_voting)

Or an STV (see -> http://en.wikipedia.org/wiki/Single_Transferable_Vote) like system with a run-off with say 5 or 10.
The problem though would setting the quota in the first round, given that only a small proportion of the total membership are going to vote.

I'm sure your programmers would enjoy the challenge of implementing a more sophisticated voting system :biggrin: