CB Register page with logged in members

Is there any way to have a main menu item which is a registration page for anyone not logged in; but for anyone logged in, instead of the generic 'you are logged in' message, have it directed to a CBSubs subscription upgrade page? To allow one menu item to control both new registrations and subscription upgrades?

[edit] To clarify, I have the following as a main menu item which is a comprofiler/registration menu item; www.digitalfabber.com/index.php/subscribe

I have also copied the url from clicking a subscription upgrade link, and it works as both a regsitration page and as a subscription upgrade page; www.digitalfabber.com/index.php/component/comprofiler/pluginclass?plugin=cbpaidsubscriptions&do=display_subscriptions

I tried making a main menu item using the external url menu item type and pasting in that second link; but it always shows that url, and not the short and more elegant 'index.php/subscribe' url. This is unacceptable to my client. So is there a way to have it display the menu item url as www.digitalfabber.com/index.php/subscribe while performing the function of www.digitalfabber.com/index.php/component/comprofiler/pluginclass?plugin=cbpaidsubscriptions&do=display_subscriptions ?

Only way to do that is to provide the generic plans page below as an External Joomla menu link. Be sure to start with index.php as follows.

index.php?option=com_comprofiler&task=pluginclass&plugin=cbpaidsubscriptions&do=displayplans

Joomla SEF won't style it beyond the option though. You'll have to use htaccess custom rewrites or 3rd party SEF to pretty it up any further. You can also try adding an Itemid to the URL, but am pretty sure Joomla will just ignore it for external links.