Best method of redirection - by: Kate

Hi, I have a busy joomla site and am about to launch a paid subscription area. I'm restricting menu items and pages to a new subscriber group. What I would like to happen is that when a logged in subscriber clicks on the member area menu item they go to a specific K2 item but if a non-logged in or unsubscribed user clicks on the menu item they go to a different K2 item. What is the best way to do this, using ACL or K2 item restrictions?

Thanks
kate