A:Answer Alright I am going from left to right here. The k version is better is the long run, the water cooling is closed so that means no maintenance it also means that you can overclock that K model. Having another terabyte is good if you have A LOT of games or files, I personally want this computer because I have 60-80 games or something that I would like to have most of them installed and 1 terabyte isn't enough. I think it is worth it but its honestly your choice and depending on how lazy you are could make it not worth it.