Welcome 
Firstly it costs you nothing if you put CoreELEC nightly on a spare SD Card and try it in your C2 before you invest in an upgrade, what I will say is after using CoreELEC on an older box for a couple of years that had hit its EOL point I did my research and the N2+ CoreELEC edition is one of the best purchases I have made in a while .
Edit the KKSB Case is also a good option for the N2+ I wrote a review on this thread