I need some Million Writers Award help!

Nope, I don't need help with reading 190 f&!#ing stories. (Note: I'm actually enjoying thereading, but it's fun to gripe about it.)  And we don't need help with the prize money, which thanks to our generous donors is looking great.

No, my problem is with the public vote for the overall winners. I recently discovered the survey tool I've always used before is dead and buried, so I need another way to conduct the public voting.

I'm considering Survey Monkey, but I'm not sure how secure they are. Anyone have experience with them? Is there a way to set up their paid system so people can only vote once? Are there any other reliable and reasonably priced online polling and/or voting systems I should consider?