Casting vote required!

The options* '2' and '4' are stuck on one vote each, so one of them has to drop out before we can start the next round. Can somebody please cast the deciding vote for the one he or she thinks should not be eliminated?

Vote here or use widget in side-bar.

* The question is "Proportional Representation: how many MPs should there be per (suitably enlarged) constituency? (Round One)"