You own a Vita? That was a mistake. Now you're stuck with a gorgeous fantastic piece of hardware with almost nothing on it. You could get some forms of current console hits in portable form. You could play slightly upresed PSP games. You can play some PS1 games looking better than they have ever looked on that delicious screen. You'll mostly use the device for playing little bitsized phone style games with an actual game pad. Apologizes for that.
If you're wondering about the 2000 versus 1000 debate, don't. You will not notice a difference if you don't have them side by side.