Can someone give me some advice on these video games?

Honestly I think it would be a good idea to get a DS. I had one and stupidly traded it in to buy a psp. One of my worst decisions. The game selection is pretty limited compared to the DS. And chances are you're eventually getting your ps3 back, so if you can wait for a little while before getting a game, why not go for a new system altogether? The DS has some pretty amazing games on it. It'll be worth your time and you'll have something to do until you get your ps3 back. Either way you're waiting the same amount of time whether you get Little Big Planet or not.