Should I buy PSP, just for the sake of Final Fantasy 7 crisis core?? T.T

After watching the Final Fantasy 7: Crisis Core trailer , i was already hooked to this game. Since i'm a die-hard fan of Final Fantasy 7 (when i 1st play the original game in PS1 ,that was like 5 years ago), now you know y, i can't just leave this game aside...oh why, why does it have to be PSP, why can't it be PS3 (i'm gonna buy PS3 anyway). Now, i have to waste so much money to buy PSP just to play this game. I don't care is Japanese version or not (since i already know the story), i just want to play this game so badly.~~~T.T
And if you don't know when does FF7:crisis Core take place, well it take place before FF7:AC and the original game...before Cloud and Co. adventure, there were this man called Zack, he always wanted to become SOLDIER, so he did, during his adventure, he meets alot of 1st class SOLDIER like Angeal, Genensis and the FF7 most famous villian~Saphiroth(at that time he was a good guy) then he meets Cloud (Cloud at that time is a low-rank Shinra soldier) and they become best friends..then at the end of the game Zack Died...ya he died..muahahaha i spoiled it for you...=D.. Why he died??? just play the game and find it out on your own.