User registration / database system recommendations?

I’m new to wordpress and I’m hoping for plugin suggestions to help manage user registration and user data.

Requirements:

1. A single, secure database of all user information – including email, phone numbers passwords, age, gender, etc.

2. This ‘master’ database should support data exports to other systems – mailchimp (email), eventbrite (event tickets), ecommerce, etc.

3. Front end mobile-friendly UIs for users to log into my wordpress site via email+password, facebook login, google+ login or twitter login and manage their profiles

4. (optional) Compatibility (or native features) for social interaction across my site like commenting, following, badges, sentiment tagging (buzzfeed), UGC uploads, etc.

I think vendors like Gigya and JanRain might offer solutions for this, and I’d love to hear people’s thoughts about integration these tools. Also curious about newer solutions that might be less expensive and easier to integrate.

Thanks!
-D