I've had the same concerns maximizing limited apt. space. Working out perfectly after finding the right selections.
What's the allure of the crossover? It takes a lot of space; very similar movements can be done using the overhead, mid-level or floor pulleys on a Bowflex or Gold's gym.
For a bench, there's only one that stands out. The attachments listed below it attach to the bench to allow dips, chins and vertical knee raises:
http://www.ironmaster.com/store/customer/home.php?cat=2 
