What is the best memory card for M3Real, in terms of game compatability and smoothless running (no freezes or lags)? I've heard that Japanese Kingston and SanDisk are the best, but is there any difference if I buy the 2, 4 or 8 GB version? Also, are cards with higher numbers in the circle on the card (like 4, 5, 6) better than these two brands or not? (plus do you have any tips where it's best to buy them?) Thanks a lot guys!