Thanks saulinpa but I'm only really interested in one with ethernet built in. The user has wifi issues in her office which we can't do much about and I'm reluctant to use a USB-Ethernet adapter as she's several hundred miles away and I don't want any hassles with that. The Ultrafine 5K is overkill, over-expensive and likely to over-heat a MBA. I wish Apple would hurry up with their rumoured new display, although that could be too expensive and too many pixels as well. It's mad that there are so few decent options for this.