which is rule-based firewall and monitors outgoing internet traffic.
XP firewall is OK but only monitors incoming traffic. If XP Firewall is enough for you, then get standalone NOD32 antivirus only
Note that AFAIK, you can use the license key of ESET Smart Security software to NOD32 and vice-versa. Check with ESET Sales support for confirmation because their policy might have change already.
I am trying to decide which NOD 32 to buy. Should I get the Smart Security Suite with Antivirus, Antispyware, Firewall, and Antispam or just the Antivirus with Antispyware? I would be buying the 2 PC pack and put one on a Laptop with XP and one on a Desktop with XP.