MiDNiGHTsoul :
With a rig like this you wont even know that its running. But if you have an obsession with it you can use Avast! AV. Lite and trustful AV and its free.
The only reason I'm considering Kaspersky is because the motherboard driver disc that came with my ASUS Maximus VI Hero MoBo, has a bunch of programs on it that I can install that it recommends, such as ROG-CPU-Z and AI Suite III and Kaspersky Antivirus.
I'll probably end up going with Avast though in-case the kaspersky comes with bloatware shit or slows my internet speed. Thats the main thing I heard about Kaserpsky, is that it slows web browsing something fierce from all the website monitoring and blocks and what not