Hi - I need a new setup for my office. I currently have: Macbook Air (2012) that I bring to and from the office. This is the 11" bare bones version. I had a lot of trouble running my big data intensive spreadhseets in Excel for Mac so I switched to Parallels and the windows version. This is working OK but could use more speed plus I need a dual display in my office. I have a mac mini (2011) at home but I would like to keep that there. I was thinking a mac mini but not sure of the specs. The most important thing for me is fast processing time in these spreadsheets. When the ball starts spinning I move on to other things and then I get distracted, lol. I need to stay in the moment for productivity's sake. Is it worth doing a build your own with the SSD? Should I try an external SSD? My plan is to get 2 non Apple monitors, as I don't need the retina display and I would rather spend my money on the machine. Thanks in advance!!