Hi. I am getting rid of my old eMachines ****-book, and buying a MacBook Pro. I am trying to decide whether or not to get some add-ons. I will be developing iOS apps and probably mac apps too. I would like to get into video editing, I do a lot of large file handling over my LAN network between computers, (which takes FOREVER on my old laptop, and its not the router limitation), and a lot of large file BitTorrent downloading. (which is just slow because of my internet speed.) My questions are: 1. Should I get the 17 or 15 inch? 2. If I get an external screen protector, will the anti-glare screen be useless? 3. 2.2 or 2.3 GHz processor? What does the GHz do? 4. 4 or 8 GB RAM? What does more RAM do? 5. 750gb 5400 rpm hdd, or 500gb 7200 rpm hdd? Or should I get a solid-state drive? I've had this eMachines laptop for 2 years and the hard drive still works fine, and I use it every single day for hours at a time, and never turn it off. The only thing that doesn't work is the battery. Thanks! P.S. I've got a budget of around 3000 dollars, more or less. And This might help.