Yeah I'm going with the 16Gb card, it comes with the vita bundle and the 32gb ones are way too expensive. Just a thought, but is it theoretically possible to have two 16gb cards with different games loaded up on both, then just swap the two cards around when needed depending on which game was on each card? That would be awesome, I could keep one in the vita and one in my wallet.
That would be the perfect solution to carrying around game discs. I have a 3DS which I'm thinking of selling, it's a nice machine but I get fed up of the game prices and carrying around those tiny cartridges. Plus apart from Zelda and Mario, I'm not all that interested in the other titles.
If I could swap out the memory cards then I could effectively carry around a large library of games without having to keep track of the physical games, all while mostly being 'free' as part of PS Plus!