Sony Memory Stick ori or Grade A?!?

Im planning to buy a bigger capacity card 4 or 8gb card and im wondering should i get a ori or grade A card.

Currently using a ori (i think) 4gb card which can only stock not more than 6 games - buying another card to store MP3 and movies.

i would like to buy ori but grade A can save my $ by almost half!!! the question is Grade A reliable?

please advise! and thank you ahead!

if u plan to watch movie and listen music using grade A memory card, then its ok.
Coz if u use Grade A m.card to play game, sometimes the game will lag.

thanks for the information.

been shopping around for ori and it seems that sony style offers the best deal. got free tee and psp straps plus 5 years warranty.

How about sandisk memory stick?

hmm....actually sand disc.....magic gate....mark 2 all are the same 1....some how like the sponser for memory stick pro dua for sony....so have to lable on it to let you guys know.......A grade m.stick is ok ..........do you mean A grade-those kind??3rd party 1 loo.....is it...??

SCE provide 1 to 1 exchange of m.stick if got any prob of it.....for 1 year since the time you purchase it.....