You should get a DSTwo if you intend on using the cart on a DSi or newer Nintendo system due to the latest developments in Anti-Piracy. If you are using a DS and have no intention of upgrading, you should try out alternative R4 menus before you make a purchase. That, and the R4iGold would be a more cost-effective purchase - it's available from the R4iDS.cn guys if I recall correctly. You can use your old carts as Christmas decorations or donate them to the needy.