Should I use Angular UI Bootstrap or plain Bootstrap 3? [closed]
There is a bootstrap 3 branch going on in angular UI bootstrap, and almost everything has been migrated to bootstrap 3 in this branch. You can build this branch by yourself, and it's a matter of days or weeks before an official release that supports bootstrap 3 is made. You should go with it.
As you can see on this link in the repo of Angular UI (Bootstrap3 support), support for Bootstrap3 is almost ready.
You are talking about long-term, so I am assuming your application isn't going to production in the next month, so I would go with Bootstrap3 and the bootstrap3 branch of AngularUI. But if you want something stable right now, I thing you should go with Bootstrap 2.3 and be prepared to update your code in the next months.