iPhone 5 or PlayStation Vita?

In February 2013, I'm up for upgrade on Verizon. I currently have an iPhone 4. I'm going to get an iPhone 5 if I do upgrade, but I actually also want a Playstation Vita. If I do buy a Vita next month, I won't upgrade my iPhone until December 2013. I really like the idea of gaming on the go with physical controls, and I really like the game selection. They are both in the same general price range. What do you think? iPhone upgrade now and Vita never, or Vita now and iPhone upgrade in Christmas 2013? Also, I already have an iPad 2. Thanks.

This is also posted on the Gaming and Mobile forums.