My recommendation: Get the OLED Vita !
...and Guacamelee and Wipeout 2048 !
Uncharted and Soul Sacrifice are not that good. Get Toukiden if you are interested in a hunting game, Toukiden is pretty nice.
Edit: And Tearaway. Best game on the system (despite the annoying soundtrack) !
...and Gravity Rush is decent too. But don´t go in expecting something groundbreaking. The game is charming and the gravity gimmick is neat.
Edit 2: Steamworld dig is fantastic too.
And congrats for your wise decision :P