i think each month you should take the top 3 files MINIMUM and make them. That or make a special montly poll with the top 10 and take the winning three or something along those lines
I create 1 new file every week, it isn't always the very top file in the voting but it is usually close and the top file in the voting gets made at least once a month.
sounds fair to me! Consider going to the other bars, not just the all around best. Some of the files in there are so great I can only imagine the possibilites