The Vita has barely any games out.
I don't really see any point in getting one at this moment in time.
Most people trade theirs in rather than buy them, and just complain about the lack of games. I'd wait out another year if you were thinking of the Vita.
Upgrade to a 3DS XL, it has a growing spectrum of games, and even more great looking games are being released this fall that will look bigger and better with the XL screen (and I have one, it looks great!). I'm sure stores near you will have special offers if you want to upgrade for a nice price. Just remember to request a data transfer before you sell it.