Yes you will need a very BIG SD for PCSXrearmed if you want to hold all the great titles for the PSX and Notaz made it to easy to want every game on there because the Emulator runs so amazing! 1389 PSX games = over 370GB FYIYou should test following games on it:
Battle For Wesnoth
Super Geometry Dust
Jaged Alliance 2
and remember to get a biiig SD for pcsxrearmed and many eBoots.