This is an excellent point. You will get this then in a year or two the 2014 will come out and you will be kicking yourself. Deal with driving the Subaru until next year and then maybe you can look at a leftover 2013 vs. a redesigned 2014.You just got rid of your Tundra to save on gas and now you want to go back?
Personally, I'd keep the Subaru, pay it off and plan for the redesigned Tundra in probably 2014.
I'm sure you'll find other deals again.
52K on a 2011 is kind of a lot. My 07' almost has 52K on it.