Hi. I just bought a New Nintendo 3DS. I checked and my version is 9.0.0-20U. Does this mean I can use both Gateway 3DS and Sky 3DS with it? Which one should I pick? I hear Sky 3ds is more "plug and play," but if I'm not trying to be a power user, is Gateway 3DS just as easy to use? Also, I would like to play DS and GBA games on this N3DS as well. Is there any flashcart that can do that? I heard that the Gateway one can work is the system version is 4.5 or less. Supercard DSTwo looks sold out everywhere. What is recommended? Thanks!