Just bought a DSi Xl off ebay (hasn't arrived yet), so i don't know the firmware version. Assuming it's on the latest version, which card should i buy? Looked at all the stickies, Like the look of both the Acekard 2i and the R4i gold. Would both of these work with the latest firmware? If not, is there a way to downgrade the firmware? PLUS, where can i buy from in the UK? Help would be much appreciated!