What to use for AV on WS 10 host

I have a laptop running Win 7 Ultimate.  It's the host machine for Workstation 10.0.2.  There are 7-8 virtual machines running a mixture of Win 2008 R2 and Win 7.

I'd like to put either NIS or Malware Bytes on the host.  I'm not concerned about the VMs as this is a dev box and I won't be exposing the guests to the outside world.

Does anyone have any thoughts / experience / advise on what to do for AV?  Am I fool-hardy for ignoring the guests?

Thanks.

Eagles