May want to check again. If you use VLAN's on a managed switch, you have to also set that device up for the port forwarding. May want to recheck your info again AV_Integrated. Obvious you do not know that much about this. As for the OP, yes they do not need a managed switch, but if does help when you want to segregate traffic across the main LAN, that can eat up bandwidth, going back through the backbone to the Router.
As for their AV software, majority out there are garbage, and there are only a few that are worth their weight, same with the firewall, which Windows firewall on Vista/7/8 will do fine, but most of us turn the firewall off while on the LAN in our homes, and allow the Router to handle the Firewall.
To get back to the basics, really there is more here that the OP really got, that does not really explain the best way to go about what they want, nor did they really explain what they are looking in doing with their LAN, since everyone's LAN is different from the other guy/gal's.