Looking for a plugin for voting

Hi

I am running a photography competition, and so far there are 94 pics entered.

I’d like to add a poll or similar where visitors can vote for the best pic.

Criteria I’d like is a way of being secure through captcha, email, etc.

I also have a pbb forum on the site, perhaps usernames from forum can be used to vote? (I know this is asking a lot!)

Registering to vote on wordpress would be a pain for some, I’m trying to make it EASY.

Visitors to be able to vote for 3 of the best photos, not necessarily 1st, 2nd, 3rd.

Perhaps having the facility to drop a cookie to stop multi voting?

The option to hide the results until the competition voting is finished.

Leaving the best till last, it’s to be SIMPLE for me and for visitors!

I know there is probably not a plugin that will do all of the above, but I’d really appreciate suggestions.

Many thanks