I've just taken the plunge into 4k (albeit more towards the budget end) with the ASUS PB287. Yes it is a TN panel, but I bought it for the sole purpose of gaming on, with my 30" IPS Dell still being used for photo editing and other colour sensitive work. Anyway, the reason for this thread is just to give my initial impressions of the monitor. It does suffer the usual TN flaws with regard to viewing angles, however this panel seems to be much improved over TN panels of the past. Unless you are sitting very off axis, the issue is not noticeable. Colour reproduction does seem to be very good too. Unless you were doing photo work, the 8 bit colour would not be an issue at all. One of the things i'm loving is the sheer amount of desktop real estate. Fortunately I have very good eye site and am enjoying using the monitor without any additional text scaling. Though I expect for a lot of people this would simply not be possible. Gaming is where this monitor really excels though. The low lag is great after using the Dell IPS and running the latest titles in 4k makes them so immersive. Anyway, if you are looking for a 60hz 4k monitor for gaming and general desktop computing, I would thoroughly recommend this one. TN panels must have come a long way since my last experience with them.