Is anyone using a TB3 Dock for their new iMac? I love this machine so far, but my biggest complaint is that they only stuck two TB3 ports on the back while keeping four USB-A. The problem for me is that I have a USB-C external monitor and a small external TB2 RAID storage box. So that is both of my USB-C/TB3 ports, so no real room for future expansion, unless I replace one of those two purposes. So what I am looking for is a TB3 dock that supports 4k 60hz video output (via DisplayPort?) to remove that, plus a second TB3 input so I can connect the drive to that and leave me with at least one more TB port on the iMac. Having a USB port in front of the machine would also be a bonus. Anyone have one they are using for an iMac/MacBook pro that they like?