I got keys for all of them. I use zemana anti malware premium and malwarebytes premium for on demand. Looking for best protection I tend to download a lot of things and tend to install software. I have Heimdal for extra.
And apart from protection, Kaspersky is way lighter than Emsisoft based on my own personal experience. The latest performance report (Oct 17) at AV-C also validates my point.
Emsisoft has quickly become an over-rated product like Avast. Just my opinion though.
use any one of them. It's very difficult to get wrong with any one of them. No one is a clear winner. All are personal choices only. All of these are top notch security.
Sorry if I sound like a fanboy but I'd pick a tweaked KIS over the other 2. Second place would definitely be Emsisoft. I think KIS, Emsisoft and Comodo are as good as it gets for home use.