Hi I am a student studying mechanical engineering and am looking to buy a MacBook Pro and would like help!! First off what is the best mac for me? 13 or 15 inch and then after that what SSD should I buy? I will be using CAD (computer aided design) like Auto CAD and solid works etc! After that I will be using the laptop for normal student usage like Microsoft office and web browsing! I also think I will be buying the 2015 model as I do not want to buy adapters for 2016 model! Thanks I would like as much detailed answer as possible thanks!