To be honest, I've heard from quite a few people that Emsisoft has been going downhill lately. I personally think that is the case too after seeing some videos. About 2 years ago it was so great. Nothing could get past it basically!
Lots of people swear by Kaspersky. I personally love Kaspersky, but I have been using NANO Antivirus for about at least 6 months and am loving using it.