EVENTS PLUGIN SUGGESTIONS?

I have a client looking for some functionality and wondering if anyone had a suggestion for a good events plugin that might work well for it.

They want users to be able to register on their site, enter specific event information, upload photos, have other users be able to comment or vote on those photos, and the ability for a user to be able to invite their friends to their event page (essentially like a forum or “wall” for the event that allows interaction). Events can be public or private and only accessible by those users they choose.

Any leads would be greatly appreciated!