Golden on the Vita is bar none the best way to play 4.
P3 has two versions people will swear by- P3P is the portable PSP port with controllable party members, and the female MC option, but the tradeoff is that you don't get to walk around the gameworld like the other games, the anime cutscenes are cut out and several moments are thus more visual novel like. P3FES is the updated rerelease for PS2, and playable on PS3 through the PS2 Classics - it has exclusive story stuff, a full post-game campaign, and is the closest looking (and feeling outside of combat) to the latter games- but your party members will be controlled by the AI. Personally, I like FES, but both versions are good and neither is truly definitive.