Actually SpyBot SD has such advanced features that I (a technician) won't even mess with. The advanced features are NOT for the casual user -- but rather
the professional or expert. SpyBot SD is excellent not only for detecting virus' and spyware, but also TO PREVENT THEM in the first place.
Having only one Anti-Spyware application installed is usually not enough. I recommend layering your security apps with 2 or more (other than firewalls).
My personal pic is SpyBot SD ( #1) and AVG Anti-Spyware (#2). I have several other apps for special occasions that weigh heavy on the CPU, and run them on a seperate machine.
Anti-Virus: Avast4Home + AVG + CA + COMODO
Firewall: COMODO
By the way, Spyware Terminator is classified as ROGUE/SUSPECT software. For a list of Rogue/Suspect Anti-Spyware apps:
Spyware Warrior: Rogue/Suspect Anti-Spyware Products & Web Sites