Hey guys, I've been reading a lot of threads lately but I yet have to find an answer to my question, so I hope you can help me out. I'm rocking a MacBook Pro 13" Retina late 2013 2,4GHz i5 model and the screen real estate is sometimes bugging me, so I've been looking at 4K screens *a lot* lately. However, I can't find anywhere if this is a really good combination, and then especially in terms of lag. I hate to see the mouse cursor lagging on the screen. Is there anyone here with first hand experiences who can advice me on this? Just for the record: I've found some affordable Dell 4K monitors at around $500 but I'm willing to spend more if it provides for a better experience. Thanks in advance!