I've not wanted to go the USB 3 route unless I had to. I've got the i5 8GB 256 SP3 with the MS dock. I run one wide monitor from the dock and the other wide monitor from the DP port on my SP3. It's no problem unplugging from the SP3's mini-DP port when I pack up and go. If I ever considered going with 3 monitors (3 external monitors), I would look into the various hub options. For me, I'd also have to go with a different monitor mounting system for 3 externals since my desk space is limited already along with the resident scanner etc.