Just about to buy the NEX-6 when....

I was just about to pull the trigger on a new NEX-6 kit - my first mirrorless camara - when I saw that Amazon has the NEX-7 kit (Used - like new) for less than the NEX-6 new...

So I'm asking - as much as I know people hate to say one is better than the other - which one should I buy?

I like the compact size of the new 6 kit lens and I do plan to use it while traveling overseas. But I am suduced by the 24mp and better image quaility...