Which PSP emulator is currently the best?

I was interested in playing Star Ocean: First Departure, Second evolution, Tactics Ogre, and FFT. If anyone is familiar with PSP emulation, or which emulators are compatible with those games, let me know.

Currently the best psp emulators are JPcsp and Pcsp.Even though they are currently outdated they do emulate a fair number of games.

Any of them can run Crisis Core?

The ones crimsonedge said, can be played on psx, the originals were released there

PPSSPP :D

It can run crysis core, but it?s still alpha, so no garanty that it runs flawless. But you also can use it on you BlackBerry, Symbian or Android phone.