If you are going to get Zone Alarm Pro, you should probably get Zone Alarm Security Suite (I use it and it works pretty well...also got an award from PC Magazine). If you get Zone Alarm Security Suite, you don't need Nod32 because it includes antivirus, spyware cleaner, firewall, privacy filter, etc. Also, I wouldn't waste my money on Ad-aware PRO, I would just go for Ad-aware free + Spybot Search & Destroy (free also). However, in my opinion, the best antispyware program is Webroot SpySweeper which I use and isn't free.
To sum things up, I would use:
Zone Alarm Security Suite
Webroot SpySweeper
But if you don't want to pay for antispyware, try this:
Zone Alarm Security Suite
Spybot SD
Adaware 6 (free)
To sum things up, I would use:
Zone Alarm Security Suite
Webroot SpySweeper
But if you don't want to pay for antispyware, try this:
Zone Alarm Security Suite
Spybot SD
Adaware 6 (free)