I need some advice in buying PSP games

So I wanted to buy certain PSP games, but I just cant decide whatever to buy them or not. Here are games I want to buy and queations I have for them:

1. Dissidia final fantasy: Can you switch voices to Japanese? Also, can you play online without PS3 party thing?

2. Mod nation: Can you play it online like I previously mentioned? Is it worth the buy? How enjoyable it is?

3.Monster hunter freedom united: How much enjoyable is this game by playing by yourself? Also, does it have online like previously mentioned?

4. Naruto ultimate ninja hero 3: Is it worth purchasing?

Please not that I downloaded the demos of all of these games and enjoyed them. Just need to confirm a few things.

Also, what other games can you recommend me to buy? (beafore you mention: I already HAVE Peacewalker)

Well, I heard that most of the time the game require to be connected to PS3 to be able to play online. If monster hunter dont require this to play online I would be very happy to check it out.

You can't switch voices to Japanese for Dissidia.

The only game in those four with any native online capabilities is Modnation Racers, I do wish I had a PS3 for Adhoc Party. :( Such a great feature. There's always Xlink Kai for PSP, but you will need a wireless access point and a wireless card in your PC.

As for favorite games, I'd have to say Crisis Core: Final Fantasy VII, Midnight Club: LA Remix, and Peace Walker(which you very admirably already have).

Well, it JUST happens that I have xlink, wireless livebox and PC with wireless connection, Im currently trying to figure it out thought.

Lucky you, I still don't have a wireless card for my computer. They can be pretty pricey, around $70CAN here.

Hello! Please use the recommendation thread for questions like these in the future thanks.