Hello, I am considering to buy a rMBP 15" 2014 model. It is fully compatible with the Dell U2713HM? It seems that although it supports 2560x1440, the rMBP 15" cannot deliver this resolution due to some kind of HDMI VGA limitation. As a result, the max resolution is lower. Also, sometimes the text is not crisp and clear. Could anybody please clarify this? Thanks.