Ellie4 - first let me extend my congratulations on your maximum score for Economics. That really is quality, and makes my first time 267 (which I thought was good) look pretty paltry. Bloody well done!
Now, as for Economics or Geography; well, if you prefer Geography, I would suggest you follow your heart, and study Geography. True, as others have said, full marks is sensational, but you shouldn't base your choice on what you want to study for the next three years of your life based on AS results alone.
Also, you say you don't like maths, so this could hinder your application to the top cluster of Economics unis (you know the ones I'm talking about
: Cam, Warwick, LSE, UCL etc), and, with all that talk of grade inflation, Maths and Further Maths A-Levels may be increasingly used as another step in the decision process.
Whatever you choose to do, I'm sure you will excel at it; and congrats on the full marks again.