Final Fantasy Tactics: The War of the Lions.

MP4's (I love to have entire movies in my pocket).

Seriously, you're worried about buying a great deal on a PSP, but you're considering buying Cooking Mama?

Wow. I'm not sure what to say.

Either way, I haven't touched my DS in ages. I use my PSP pretty regularly.

I strongly suggest that you buy the PSP. As long as you know what you're doing, they're amazing.