I recently upgraded the video card on my MP 4,1->5,1 to a flashed EVGA GTX 980 and I am now interested in upgrading my monitor to a 4K display. I am running the latest version of El Cap. Can anyone who has experience with purchasing 4K monitors shed light on the topic? I am just getting started with my research on this topic - thanks so much for any help. 1) Are there any general compatibility issues I need to be aware of - i.e. do any brands play more nicely with a cMP? 2) Will I have any problems getting 60 Hz refresh on a 4K monitor? It sounds like this is only an issue with 5K but can anyone confirm. 3) Are all new 4K monitors SST at this point, or do I still need to watch out for any that are MST? 4) Any other miscellaneous advice?