By no means would this be my personal final four, but four strong shorts overall. The second pairing was harder for me to vote on, so I ended up going with the short that hasn't won yet.
This is going to sound strange, I voted for AN ACHE IN EVERY STAKE, but am rooting for HOI POLLOI. The former's my #2, and the latter's my #3, hence I voted for the former, but like you said ACHE has won and HOI POLLOI hasn't, so a part of me wants to see HOI get it. Still, I gotta be honest and vote for what short I think is better.
As for A PLUMBING WE WILL GO, my favorite, it will always be a bridesmaid in this thing. At least it lost to THREE LITTLE BEERS, which is a great short in its own right.