If you routinely find yourself dredging up stuff from deep in the kill ring you might want the browse-kill-ring extension, but you also might want to think about using registers, which are emacs's idea of a solution to your problem: If you often find yourself wanting to explicitly distinguish between delete-forever and delete-for-recovery, you should probably try distinguishing between delete-for-recovery and add-to-the-kill-ring-in-case-of-emergency instead; it's safer.