Zone Alarm and McAffee.

I had been using Zone Alarm Anti Virus and McAfee but having downloaded
the latest ZA file, they now seem incompatable.

What is the best option?

Just use ZoneAlarm AV and uninstall McAfee (since the subscription is
running out anyhow).
Or go for the McAffee AV and buy its firewall?

Also, ZoneAlarm AV is not the same as ZoneAlarm Pro. Is the ZA AV a
better option than the Pro bearing in mind it is still a firewall.

Of course, I require both the firewall and AV componets.

Thanks.