Hi all, I am in the market for a new MacBook and decided I must get one with a retina display! I am considering the following sales: base 13inch for $1199 or the base 15inch for $1499. I plan on doing everyday task (email, Internet, music, apps) and like to be able to multitask well. I would also like to have the ability to do some basic photo editing and podcast recording in the future. My question is will I really notice any difference other than screen size with the 15inch? It seems very large to me while the 13inch seems like the perfect blend of power and size. Thanks!