Which one should i get, PSP 3000 or PSP Go?

there is so much to talk about but my question is, not which is better, but which will i enjoy more? i like kingdom hearts and i NEED that game, i also want thrillville. ok so the psp 3000 is bigger and the buttons arent protected but that really doesnt matter to me, what are the battery lifes of each one? i saw that the go has bluetooth and a multitasking feature but i dont think that it will be a big deal if i dont have it. The go looks cooler but i really dont care. The biggest thing is, over the summer i am going to try and get a job and save up for the ngp when it comes out around Christmas and sell the psp i am debating on right now. Can you play kingdom hearts birth by sleep on the ngp since it is UMD? i just have so many questions!!! please answer!!!