So you would like to show a different set of menu items to your logged in users? The User Menus plugin has you covered. It lets you apply visibility rules to menu items, so logged in or specific user roles can see menu items that apply to them. It can also display name, email, and other info in menu items.
User Menus for WordPress comes with a convenient menu importer, so you can move user menu data more easily. This plugin is available as a free download. You can find out more about it here.