I have a class 2 Sandisk 16GB card and while it works for the most part, it's quite laggy in game such as Castlevania DoS and PoR, and TWEWY. And even on other games' opening and in-game movies like Tales of Hearts, where it lags quite a lot in some places. Somebody told me some time ago that I needed a card with higher speed, preferably a class 6 one. What's a good one I can buy that works the best with the M3i Zero and will eliminate my lag and freezing problems? EDIT: Well, I decided to go with the Transcend! I've been using it for close to 3 months now and it's working out great (eliminated most of my lagging problems)! Thanks to all that commented!