Accessing SharePoint 2010 Data with Client-Side APIs from a ASP.NET web application

I want to make available files from the sharepoint server 2010 to my clients but I do not want them to connect to the Sharepoint site directly. Instead I want to create a custom asp.net web application which will reside on the same web server. Thechnology used will be Sharepoint Client API The client web application will have limited features: -View files -Search throught files in the client main document library -Download files -Email files as attachment There will be an admin area for inhouse users and will have the following features: -User administration - basically is about maintaining a file with users and what they need access to(UserID; First Name;Last Name; email; company; workspace) -Upload Files in Sharepoint document libraries. Single file as well as multiple files Project Modules [login to view URL] [login to view URL] - Upload files - User maintenance [login to view URL] - List view - Search - Download [login to view URL] reporting [login to view URL] Access - DAL(connection to the SharePoint data store with Client-Side API