You can check out our personal cloud software Tonido (http://www.tonido.com). It organizes all your music, video collection and makes it available from anywhere. We have very good mobile apps for iOS, Android and even for Windows 8. You don't need to take our word. Just check the app ratings and reviews in app stores.
you don't even need tonidoplug for it. If you have an old PC or Linux box and you can mount your NAS containing your music, you can just install the free version of Tonido Desktop and stream all of it.