Yup agree with the 8GB, it's really tough tho since you can't get one locally so it totally kills the impulse buy reward.
The 13" Retina MBP isn't that much bigger than the air and the retina display is eyeball melting. Check them out in store, there's a 8GB refurbished one available too.
http://store.apple.com/ca/product/FD...retina-display