Just choose that because the PSP Go is going to have 16GB flash memory on it. It probably would be smarter just to get a 4GB but I have no clue what the download size for games will end up being or what sony has planned (like if you'll be able to convert UMDs to digital, etc.) I'm just planning on that, but it'll probably be smaller or something.
you're best better be getting a 8 gig IMO
16 gb is too much and unnecessary, its like buying an xbox elite and barley touch your xbox.
true, game sizes to vary. the most a game can have is around 1 - 1.5GB which are suzumiya haruhi no yakusoku, im@s, crisis core, and god of war. other games like ace combat, tales series, gundam games and monster hunter freedom and unite are like 500-700 mb (still dunno the memory size for project diva)
but you can always just delete games from your memory and add new ones if you dont like em or want to play something else but dont have enough memory space. of course your game savedata will be there just not the game.
its ultimatley up to you sir