For years I'm using some antivirus software and different firewall. Now every antiviruses have got some firewall features and there are complete "internet security" complexes... and every firewall get some antivirus functionality and there are "internet security" versions.
Firstly, it is hard and sometimes impossible to install and use standalone AV and FW. Sometimes I can't avoid them (i can't install KAV2010 without removing Outpost firewall etc).
Secondly, complex solutions have some disbalance. Farewall from famous antivirus-brand is so user-friendly that is not suitable for me (lack of details in Norton Internet Security for example) and antiviruses from famous firewall-brands are still weak, it is proved by tests.
What is today best-practices in case of functionality and security?) Some internet-security complex or two standalone applications from different vendors?