Looking for an Wordpress theme

Hey guys, i need your help, or recommendation, in choosing an WP Theme. I'm looking at the following feature:

1. There should be an option for the user to login and submit content.
2. User should be able to login via FB/Twitter/Google+ should they want.
3. Should users wish, they can upload images along with their content.
4. All user submitted content should need to be in the first page with a little synopsis rather than the entire story. So it would be sorta blog.

I've have searched in Google, but i would like BHers recommendation before i chose the final product. I am open for both commercial as well free theme. Your help is always appreciated.

I think you can go to themeforest there are couple themes which is good with your feature...

try avada or u-design..

That would be possible with a WP theme that uses BuddyPress.
As mentioned above, I would look at themeforest, you might find one over there.