As the title states, help me choose which to buy. I have a Mid 2012 MacBook Pro 13" that I have upgraded to 16gb ram and 500gb SSD. I am interested in buying a new tbMBP. I have always had a 13" but am not afraid of the 15". In a perfect world, I would get a 13" with 512gb ssd and 16gb ram but that is a bto option and I would rather walk in and get what I want. I think I want 16gb ram but that only leaves a 15" to walk in and get. I can live with 256gb ssd as I will take out the 500gb ssd from the old one and get an enclosure. I also have a Thunderbolt display. So would I need a Thunderbolt 2 to 3 cable to use it? I will not use it for any heavy tasks. What should I get and why? And what other cables/hubs would you recommend? Thanks in advance for the advice!