I have owned and used the 27" ACD and 27" ATD very happily, but I am now looking to get a monitor for my home rather than just having them at the office. Knowing that a new 4K monitor is coming in the upcoming years, rather than spending $1K on a soon to be obsolute ATD I am going to try to get a Monoprice, Dell, or cheap korean monitor to bide my time. Question 1: I see that some of the monitors like the Dell have downstream USB ports, is utilizing these as a "docking hub" for printer, etc as easy as connecting a bi-directional USB cable from rMBP to the upstream USB port on the monitor to get access to the other downstream ports on the monitor? Question 2: Does anyone have any preference or recommendations for a <$500 2560x1440 27" or 30" monitor? I have seen a few Dell U2711 on Craigslist for around $300, is this a decent price or should I be wary of buying an older model? Thanks for any recommendations or experiences!