I'm thinking about buying a Pioneer avic-x910bt but from what I've read on the web the ipod cable doesn't support the ipod nano 5 for this unit. Is this true, or is there an update to get around this? I'd rather not spend another $200 on the Kenwood DNX6140 just for this reason, I like the menus and visualizations of this unit better.

it should work no problem, however it probably wont charge it.

if you get the Apple brand USB cable w/ composite video, then that should fix the charging issue.