get a known brand or something you've seen got a good result in a test... i don't have the links on this computer but i think you'll find something if you just google around a few minutes ;P
you shuld get a card that has one of the best performence results of them all, if you ask me. it's worth it!
Yeah thanks for the replies guys, good performance is what I'm after!
It's actually for my uncle btw, he's got a M3 CF for his son's DS but now his daughter wants one too, as I'm sure you know kids can often be into one thing and not care the next he doesn't want to go all out and buy a whole new flash card, he just wants her to have her own memory stick for now with her own games and see how she gets on with it