Hi this is my first post in here. I am a rising senior in high school and I want to buy a MacBook Pro to use in college. First I want to know if there is any way to know whether I should wait to buy for when newer models come out. Secondly, I would like to buy a MacBook with a disk drive (I believe the MacBooks with retina display don't have them, right?). Also, is the difference between a 13 and 15 inch worth the price? I will probably be using my MacBook for standard stuff like writing papers, browsing the Internet, and steaming videos on Netflix. I don't need anything for fancy video or photo editing, just something that will last long. Any recommendations/advice? Thank you!