Urgent: Need suggestion on MacBook air

Hi I'm trying to buy a MacBook air. Short on time so I am posting where I have gotten quick feedback and there are lots of Mac users here. Apologize if it's not the place for this. Deciding between GIga hertz vs memory (not sure how that impacts performance) Option 1) 1.6 GHZ with 4 gb memory Vs Option 2) 2.13ghz with 2 gb memory Will be using it for mild web photoshop, light movie edits for YouTube and lots of web programming