I quite liked TheBoost's idea of ending ROTJ with a pan up to the night sky and then a jump to Hyperspace (it's the end of the story so the audience is leaving the galaxy far, far away and moving on).
doubleofive's suggestions list is a good place to go to see if something has already been covered (most of your points are on there) :
http://originaltrilogy.com/forum/topic.cfm/RE-ESB-and-ROTJ-Wishlist/post/343302/#post343302