I planing on putting a SSD drive in my mac mini and keeping the stock 1TD inside it just for files. Any suggestions on what size I should get? Its a 2012 i7 with 16gb of memory. Im running Yosemite; and the plan is to use it as a server for media and time machine backups, maybe some video editing with final cut, and have it run windows now and again for Auto CAD. Suggestions on what size I should get?