Best answer: The second-generation ThinkPad Lenovo X1 Extreme supports up to four independent monitors, including the built-in display. Connect external displays with two Thunderbolt 3 ports and a single HDMI 2.0 port.Versatile Ultrabook: Lenovo ThinkPad X1 Extreme (Gen 2) (From $2,459 at Lenovo)27-inch 4K monitor: HP Z27 ($539 at HP)