Hi all, I currently have a 2015 rMBP connected to a Dell P2715Q via mDP. Everything works great and I get the standard retina scaling options at 60Hz. I plan on buying my wife a rMB to replace her old MBA. What sort of experience will she get when connected to this monitor? I'm guessing the standard Apple HDMI lead will immediately drop her to 30Hz, but will she still get the full range of retina scaling options? Assuming there is a third-party USB-C to mDP cable available. Would this allow the rMB to drive full 60Hz. Thoughts? Cheers!