Hi all I currently have an iMac 21.5" totally max out and totally max out mid 2014 rmbp 13" I brought a new dell 60hz 4K monitor and love it. My 2013 rmbp runs ok ish at 30hz but isn't really man enough and lags on external monitor I'm sold on the monitor and so what a new laptop. I'm going to sell the iMac because i'm not at my desk so much So i'm going to sell the iMac and 13" rmbp and get either the newer 2015 13" or 15" released this week with a dgpu What would you guys get ? The difference between a maxed out 13" and 15" isn't massive. I've fallen in love with the 13" form factor but its doesn't have that new GPU I want 16GB ram for VM ware, I might fire up a game once or twice. Very rarely really. But worried the iris 6100 isn't that great with 60hz.(Thats what i'm reading on here ) Help !!!!!!