I need to upgrade my mbp to a desktop workstation. I've been waiting for the skylake iMacs to make an appearance, but I'm intrigued by the mp. For rougly the same $ as a upper end imac a refurbished late 2013 6 core can be had. The retina display would be nice, but not necessary. I have a 32" wqhd monitor for cad that is adequate. I may add a second monitor at some point. Primarily my uses are autocad (lite for now), office applications, spreadsheets, limited 3d work ( sketchup). I run a vm with parallels 10 to use a couple windows based analysis programs. No gaming, video work, or music. I get a lot of beachballing now if I have a large pdf open at the same time I'm working in autocad. This is usually working on a dwg file while viewing a related pdf file containing architectural dwgs. I also run into issues if the windows vm is running while I'm running autocad. I have the vm set up to use 1/2 of the mbp's resources. Currently running a 2010 mbp w/ 8 gb ram, i5, 500gb ssd, os/x 10.10.5. I'd like to figure on a 5 yr life for the new machine. I do like the format of the mp and that you can separate the horsepower from the monitor. Any advice would be appreciated.