I have a couple of 4GB cards, I haven't filled any yet though as I delete the game data as soon as I get the platinum. Ah, motorstorm RC. That was one of my first vita games and it took me 6hrs to get the platinum according to the in game timer. Have fun racing my ghosts
Also, avoid Table top tanks unless you know somebody with a vita. There's an AD-HOC trophy so you need 2 vitas. The other week I stood by the PS Vita games in Gamestation and asked people if they played the game, I just got weird looks and the occasional 'No' . Was worth a try I guess.