Create HTML5 Music Library Website

We want to create a new website site offering all forms of music, for all forms of media including radio, television, film, gaming and online. The main heart of this new site will feature a powerful search engine and an easy to use audio player system which will allow users to browse and select the music to download based upon their eligibility. Think beatport! The site will be accessible to 3 levels of members. All members can browse and audition music. It will incorporate a search Engine. This will comprise of the main part of the site and will need to be very navigable and straightforward to use and work with the audio selection process. The user must be able to search via keywords:- All audio must be available to audition and select for download with a slick and easy to use system. Site must be CMS based so back end users can configure the output material on the front end. Site to be completely HTML5 compliant including playout systems, which include audio / video. Site needs to look professional, fresh & eye catching!