The Right Macbook for College

So in the fall of this year I will be starting college and Im planning on getting a macbook, but I dont know which one. Im leaning towards one with a retina display since its the future of notebooks and I dont want to get the old generation its like getting an iPhone 3GS when you can get a gorgeous iPhone 5. Here are my options that I narrowed it down to and these prices are educational prices :

Macbook Pro 15' w/ Retina Display : 1,999.00

Macbook Pro 13' w/Retina Display : 1,599.00

Mackbook Air 13 1,149.00

Im probably going to use it for causal writing papers and stuff a normal college does not video editing or anything powerful/graphic intensive stuff.

WHAT IS THE BEST OPTION HERE?