Hi, Macrumors, I am thinking about buying the newst rMBP 13" model (early 2015) and a 4k monitor (3840x2160). I would like to ask you about your experience with a similar setup. I read that the new rMBP 13" is capable of running an external monitor with a 4k resolution @ 60 Hz, but I am not sure it will be smooth and whether or not it will be slowing my CPU. Also, I own a wireless headset with an HDMI processor (Sony MDR-HW700DS) that is supposedly capable of 4k resolutions. But it would mean that I would have to use an HDMI cable (or possibly a mDP > HDMI cable) instead of a thunderbolt cable... would that be a problem for me or is there no difference?