Sadly, the 212 is compatible with my case. But I was either looking at a TX3 or a CRYORIG H7. And I'm not to sure if my motherboard will be good for overclocking, will do some research.
Go for the H7. You only have a 4 pin power socket to your cpu and no mobo vrm cooling so you might be right, though this is just me looking at pics. The internet will reveal all. If you haven't already get a hardware monitor such as hwmonitor64 and monitor cpu core load during gaming. If you are happy with fps and video settings and your cores are working below full load then all is good.
I think you could OC the cpu a bit
Very slightly, not to to much though.