I'm looking to possibly replace my desktop with my Surface Pro 4, I currently use it with a bluetooth keyboard and mouse and my monitor has a USB 3.0 and 2x USB 2.0 ports, however my SP4 has all sorts of cables coming out of it (a charger, USB cable to monitor, a MDP to monitor and 3.5 to speakers. So I was thinking about picking up the SP4 dock for £169 once I sell my current desktop, however I noticed Microsoft are selling off the SP3 dock for around £90. I only use one monitor which is fine through the MDP so I don't need the two video outs however I've heard the SP4 doesn't sit will in the older dock. Does anyone have any experience with it and would you think it's worth the extra £80 for the Surface Pro 4 dock? Any thoughts would be welcome.