Thinking of upgrading to a DSI as I want larger screens. I also hear the screens are brighter and look better. I have done some research and it looks like the M3I is the best cart for the DSI at this time. Does M3I use .Sav files? Could I transfer them from my CycloDs? Does the M3I allow the DSI to go to sleep when you shut the lid during gameplay??? Is this upgrade even worth while? I have an old DS Phat and DS lite and would like to keep the lite but might sell both for funds so I need to know how safe I am on solely relying on the M3I for all future needs.