I actually prefer the mini nova to the evod but I'm not really sure why. They both perform well. I have to tip my mini novas sometimes to keep the coil wet . .I have to tip my evods sometimes to de-flood them. I prefer rebuilding the evod vs the mini nova. Even though the process is very similar, I just seem to have better results rebuilding the evods. But . .I have had mini nova heads last a really, really long time. The one I'm currently using has been on there for months and is still vaping strong.
I've never tried a CE5 - so that will probably be the best of the 3, lol.