I need to run Windows for work. I currently have a 2012 MBA 1.8GHz with 8GB of RAM. I can either use that, with Fusion 8. Sell it and get a 13" rMBP and run Fusion 8. Or just get a Surface Pro 4. I need to run MS Office, including OneDrive for Business and have Excel and Outlook perform at native speeds or close enough. And I will be running QuickBooks Enterprise 15. I will use 2 external displays, and always have 2 QB companies open, up to 10 spreadsheets, and I bounce through apps and really ask the box to keep up with me. Is Fusion even worth it in this environment. Going with a Mac allows me to Target Display Mode my 27" iMac at home. But I will also need a CalDigit TB dock or OWC TB dock at work to connect 2 displays and ethernet and Keyboard. the Surface Pro 4 can do all those things easily except for connect to my iMac. So at home I'm SOL for a display unless I want to either a) get rid of the iMac and get a Mac Mini and an ultra wide display for the mini and SP4 to share, or b) get an extra display to either crowd my desk or put on the floor in the corner when not in use. The SP4 screen by itself is not a consideration for any real work. Any suggestions or feedback would be great. Thanks.