Should I store user data in session or use a custom profile provider?

On my site when a user logs I create a session object with the following properties

DisplayName,
Email,
MemberId

Questions

1. Would it make more sense to use a custom profile provider for holding user data?
2. What are the pro's and con's of each approach (Session and custom profile provider)?
3. Does it make sense to use a custom provider for read only data that can come from one or more tables?

My answer is not direct approach to your question. It is just an alternative approach.

Instead of custom profile provider, I create custom Context to keep track of the current logged-in user's profile. Here is the sample code. You can store DisplayName, Email, MemberId stead of MyUser class.

void Application_AuthenticateRequest(object sender, EventArgs e)
{
    if (HttpContext.Current.User != null && 
        HttpContext.Current.User.Identity.IsAuthenticated)
    {
        MyContext.Current.MyUser = YOURCODE.GetUserByUsername(HttpContext.Current.User.Identity.Name);
    }
}

public class MyContext
{
    private MyUser _myUser;

    public static MyContext Current
    {
        get
        {
            if (HttpContext.Current.Items["MyContext"] == null)
            {
                MyContext context = new MyContext();
                HttpContext.Current.Items.Add("MyContext", context);
                return context;
            }
            return (MyContext) HttpContext.Current.Items["MyContext"];
        }
        }

        public MyUser MyUser
        {

            get { return _myUser; }
            set { _myUser = value; }
        }
    }
}