What PS1 Memory card is best for me?

Well, the capacity is up to you... I personally try to get the biggest capacity possible...one word of advice from a dude that knows firsthand...get an official ps1, or an officially licensed ps1 memory card that utilizes the magic gate technology, because if you don't, eventually your system is gonna crash and your ps1 will crash, and it will never work again. Plus, it voids the warranty. I burned 3 systems over that crap, using non sony licensed peripherals on my ps1's.