After Effects intro animation video

I need a short 10-15 second intro video which will be similar in style (and quality) to these 2: [login to view URL] [login to view URL] you will need to be able to sync your animation to a soundtrack (like in the example videos) and you will need to do it in After Effects as the final deliverable will be the after effects project, including a version which makes use of pre-rendered footage so that no plugins will be needed when i render the video, and a version which requires any plugins you use to. For you to be considered I will need to see a portfolio with examples of similar projects you have done. If all goes well, this will lead to more projects of similar nature