Security: NFS or Samba?

[marcus]

In the Guarddog firewall program, it states NFS as high risk, and Samba 
as medium risk. Is this justified?

I wanted to use NFS, but securing it seems to be a lot of work. I found 
a very good admin tutorial. I only need this for a home network.

I have a PC wired to the LAN port of a wifi DSL router, and a laptop 
connecting via wifi using WPA2.

I'd appreciate any tips on this. Thanks,

Marcus